This Lafayette radio receiver (model HE-30) is a basic single conversion tube semi-professional short wave communications receiver. It covers 0.55 to 30 MHz in four bands. The multi-frequency bands was used on an experimental basis in FCV Divisional Offices to monitor district radio transmissions.Used on an experimental basis to monitor fire radio trafficLafayette Radio Receiver HE-30 With operating manualradios, forests commission victoria (fcv)

In the mid 1960s, Amalgamated Wireless Australasia (AWA) was asked to design a solid-state replacement for the PYE TRP-1 in collaboration with the FCV. The new transceiver was to be more powerful than the TRP-1, with an output power of about 10-12W (compared to 1.5-2W). The set also had to be capable of being used as a walkie-talkie, as well as being suitable for use in a vehicle The FP-1 is a single channel radio that has a crystal for each channel, and an IF frequency of 45 5khz. The receive crystal is 455khz higher than the transmit crystal. It is completely transistorised, and uses AWA and RCA brand transistors. A later version was called the FP5 and had five channels. Introduced to the FCV in the mid 1960sRadio Receiver Forest Phone FP-1 radios, forests commission victoria (fcv)

After the 1939 bushfires, the Forests Commission invested heavily in a radically new communications network. After suffering some inevitable delays due to the War, radio VL3AA switched into full operation in October 1945 proudly beaming out 200 watts across the State. The communication systems were regarded at the time to be more technically advanced than the police and the military. These pioneering efforts were directed by Geoff Weste, and later technical experts like Rex Philpot, John Whitehead, Charlie Reisinger and many others who designed, built and repaired most of the radio equipment. There was a dedicated radio laboratory at Surrey Hills in Melbourne.Radio setSTC Star Radio Telephone Type FR5.1.25-STradios, forests commission victoria (fcv)

These boots were manufactured by Oliver Stevens in Ballarat to the Forests Commission's own specification. Safety boots were a bit "hit and miss" back in 1981. As well as the steel toe caps these boots had a screwed, glued and stitched Sherpa-pattern rubber nitrile sole. The sole was oil resistant and didn't melt on hot coals. The yellow heels signified safety boots. There were two styles with different leather and staff were all personally fitted and given their choice of style. The only thing that has fundamentally changed over 40 years is there is much more choice and comfort in boots today. These boots proved to be the catalyst for boot manufacturers realising there was a market outside of the armed forces not being served. Ankle injuries along with elastic sided boots were virtually eliminated by these boots. The iconic Tasmanian company, Blundstone, had a work boot called "Forester" at the time. It had won an Australian Design Award and had a bonded Sherpa sole. Unfortunately, the soles tended to separate from the boot under field test conditions. Eventually they perfected the process Oliver Stevens' main issue was not being able to recruit enough workers to meet the increased demand. Info: Trevor Brown.First safety boots issued to Victorian forest firefightersYellow Back safety boots with leather laces. FCV marked on the heel fire fighting, bushfire, forests commission victoria (fcv), protective clothing

Foresters usually measure the diameter of trees at Breast Height – traditionally 4 foot, 6 inches – now 1.3 m – which is termed Diameter Breast Height Over Bark (DBHOB). Basal Area is the cross section of the tree trunk at breast height, and the sum for the stand or group of trees is expressed square feet per acre (after 1973 it was expressed in square metres per hectare). Lots of skinny trees, or a few fat ones, can have the same Basal Area, but when combined with the number of stems, Basal Area is a good indicator of stand density. Two common methods are used to measure of Basal Area – fixed area plots and angle count sampling. 1. Fixed area plots require setting out a small area, commonly 50 m x 20 m, and measuring all the trees at breast height, and doing some quick sums. 2. Angle count sampling involves a simple sweep of the forest from a fixed sampling point using a relascope, dendrometer sight, angle gauge, or glass wedge prism. This wooden builders ruler has been shaped at one end to create a shallow angle (usually less than 3 degrees). Standing in one spot, a sweep is made with the wedge held to the eye, and trees are counted as either “in” or “out”. The number of trees is multiplied by conversion factor of the wedge (10 in this case) to estimate basal area. It’s very quick and effective.Basal Area Angle Gauge The two ends fold up and one end (on the right) has been reduced in width to create a shallow angle for the viewer Home made by cutting down a wooden builder's ruler Many forestry students made their own Basal Area Angle Gauges and its thought this may be oneforest measurement, forests commission victoria (fcv)

The Forests Commission took safety very seriously, long before it became standard practice in the bush. The Chairman of the Commission, Alan Threader, personally chaired the safety committee Sandy Dobbin was appointed as the first "safety officer" in the early 1970s There were many innovations including safety boots and safety hardhats. Safety hardhats. One new hat with "two trees" FCV logo. One with hat with older style FCV sticker belonging to District Forester Col Almond (decorated with logos from the amalgamated CFL agencies).forests commission victoria (fcv), protective clothing

Linked to the 1983 Ash Wednesday BushfiresSmall metal lockable cash box with handle and tray insert This item was burnt in the 1983 Ash Wednesday bushfires which destroyed the FCV Office and nursery It was recovered from ashes of the building It was in the office safe and contained charred bank notes and a chequebushfire, forests commission victoria (fcv)

Y valves were used to split water supplies so it could be directed to a number of locations on a fire. In this case four outlets with two controlling valves. Canvas 1.5 inch hose was normally attached Screw connections rather than twist-camm locksY ValveYarrawonga Forests Commissionbushfire, fire pump, forests commission victoria (fcv)

Signs were erected around the forest to restrict the use of firearms.Shooting Prohibited sign - canvasbushfire, forest signs, forests commission victoria (fcv)

Bushfire perimeter rather than bushfire area is the main control problem for firefighters on the ground. A conundrum rapidly compounded by spot fires. A small 5 ha fire can be nearly 1 km around the perimeter. That's a long way to build a control line by hand in rough bush. Dry firefighting techniques by hand were mostly confined to “knocking down” or “beating out” the flames, as well as "digging out". Digging or raking a “mineral earth” trail down to bare dirt proved most effective in forest fuels which, unlike grass, tend to retain heat and smoulder. Early tools were whatever happened to be close at hand. They were simple and primitive and included shovels, slashers, axes, hoes, beaters and rakes. A cut branch to beat the flames was often the only thing available. Farming and logging tools, developed over centuries of manual labour, and readily available at local hardware stores came into use, but little thought was given to size, weight, and balance. For years foresters experimented with combination tools. In about 1952 fire beaters and other implements were being replaced with Rakuts. However, its believed the now common Rakehoe is an Australian variation of the American McLeod Tool which was developed in 1905 by forest ranger Malcolm McLeod of the Sierra National Forest. The late Athol Hodgson advised that predecessors, Reg Torbet who had been the Chief Fire Officer for the Forests Commission from 1948-1956, along with his QLD counterpart Clive Price, went in late 1951 as Australian delegates on a 10 week fire study tour of Nth America organised by the United Nations. They came back with a couple of McLeod tools from Canada. Cam MacLeod (different spelling) had been the Head of Fire Research for the Canadian Forest Service at the time and had supplied them. The tools were ideal for deciduous forests in the eastern provinces and Clive arranged to have them manufactured in QLD. The Rakho, as it was then spelled, was first issued to FCV crews 65 years ago in 1955-56. The American Pulaski had been trialled, but never found favour with Australian firefighters.First used in 1955Rakehoebushfire, forests commission victoria (fcv)

Timber panels salvaged from the foyer of Forestry House 601 Bourke Street in late1980s. The material for the plaques was assembled in carpenters shop in FCV districts throughout the State. Timber was kiln dried by M. Feiglin & Sons at Nunawading and erected by Peter Danby Pty. Ltd. Two highly decorative panels thought to be carved by Robert Prenzel in about 1908. Closely linked to FCV Forestry House in MelbourneTimber Display PanelTwo highly carved panels thought to carved by Robert Prenzel in about 1908forests commission victoria (fcv)

Before metrication was introduced into Australia in the 1970s land was measured in chains and links. Many old parish plans show length measurements in chains and links. Area was shown in acres, roods and perches. Gunter's chain was used for measuring distance in surveying. It was designed and introduced in 1620 by English clergyman and mathematician Edmund Gunter (1581–1626). Gunter developed the measuring chain of 100 links. The chain and the link, became statutory measures in England and subsequently the British Empire. After metrication units of length were measured in meters and area in hectares. The chain was later superseded by steel ribbon tape.The 66 foot long brass Gunter's Chain is divided into 100 links (each 7.92 inches long), and marked off into groups of 10 by shaped tags which simplify intermediate measurement. It was heavy but flexible enough to be dragged through the bush on surveying transects.(Hence the common forestry term "chainman). The chain was a precision part of a surveyor's equipment. It required frequent calibration, yet needed to be sturdy enough to be dragged through rough terrain for years. It has brass hand grips at each end of chain. 1 chain = 100 links = 22 yards = 66 feet = 792 inches. 10 chains = furlong 80 chains = 1 mile 1 acre = 10 square chains = 4 roods (1/4 acre) = 40 perches.forest measurement, surveying, forests commission victoria (fcv)

The origins of the humble handheld driptorch have been lost in time. They are widely used for ignition in controlled burning operations in forest and grasslands. This "home made" burner wand uses kerosene and dates from the 1950s. It has an unusual long handle with a bend and wick one one end.Unusual "home made" design Long handle burning wand with a wick at one end. Brass flow valve in the middle. Base attached to a container of kerosene and has a screw cap. bushfire, forests commission victoria (fcv)

Bushfire awareness gallows signs were common features during the summer fire season and hung outside both FCV offices and on major roadways This large metal sign has different text on each side and the text and lettering is simple enough to be read from a moving vehicleBushfire Awareness - gallows signbushfire, forest signs, forests commission victoria (fcv)

Method of carrying rolled up canvas fire hose. Canvas hose needs to be washed, dried, rolled and stored properly after it has been used otherwise it will rot. Unrolled hose is notorious for becoming tangled. Canvas fire hose and roll carrier. The wire handle separates in the middle to release the hose rollbushfire, forests commission victoria (fcv), fire pump

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. But wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Wind speed can be measured using a variety of anemometers. This simple hand-held Venitimer was made by Elvometer in Sweeden, probably in the 1960s, and was designed for principally for mariners. Some models have a compass in the handle to measure wind direction. The small inlet hole on the side is faced towards the wind and air pressure lifts small plastic disk inside. The upper tube is tapered so that as wind speed increases more air escapes and stronger winds are needed to raise the disk. Wind speed in MPH is read from the side of the clear plastic tube. The waterproof container has instructions on use and conversion scales. Simple and robust device.Hand- held wind anemometer Instructions on use on containerbushfire, forests commission victoria (fcv)

This instrument measures elevation by sensing minute changes in barometric air pressure relative to a fixed datum point at sea level or a known elevation, such as the starting point of a major town during a road survey, and has an accuracy of +/- 20 feet when used in experienced hands. The finely divided scale around the perimeter of the face is marked from 0 to 6000 feet elevation and 25 to 31 inches of mercury (Hg) for barometric pressure The single fine counter-balanced hand or pointer rotates anti-clockwise with increasing elevation and decreasing pressure. The label "compensated" indicates that the instrument is constructed to compensate for the effect of temperature changes on the accuracy of readings. Surveyor's Pocket Altimeter - Aneroid Barometer Type Branded N H Seward, Melbourne. Made in England. With leather carrying case and strap.forest measurement, forests commission victoria (fcv), surveying

Metal branding hammers were the most common way to control the sale and movement of hardwood timber produce like logs, railway sleepers, fence posts, and poles from Victorian State forests. Royalty was also paid on this basis. The hammer has a crown stamp on one end with a unique number in the middle (453) which identified its owner, and a crows foot or broad arrow on the other. The broad arrow was a symbol traditionally used in Britain and its colonies to mark government property. Forest regulations state that an authorised officer may use the crown mark to identify produce which has been sold and may be removed from the forest, whereas the broad arrow can be used to brand and mark trees which are not to be felled, or to indicate forest produce which has been seized. Hammers were traditionally only ever issued to forest officers and were an important, and closely guarded tool-of-trade. They were not transferred between staff and lending hammers was not permitted. But it was an onerous task for staff to hammer and tally hundreds of logs, or thousands of fence posts each week, so in about 1990 a system was introduced whereby hammers were allocated to logging contractors to grade logs and tally them instead. But there was still spot checking by authorised officers. A register was kept, and contractors paid a substantial deposit to make sure they didn't lose them, but they occasionally turn up by fossickers with metal detectors. While branding hammers are still used in some smaller locations, plastic tags and barcodes are now more common.Metal log branding hammer with a crown stamp on one end with a unique number (453) in the middle which identified its owner, and a crows foot or broad arrow on the other. The unusual bent metal handle was designed to protect user from banging their fingers on the log. It was also fitted with a rubber hand grip. Most FCV branding hammers were issued with wooden handles. The branding hammer 453 was initially issued to Wally Cowell at Beechworth. It was reissued to Jim Browning upon Wally’s retirement The hammer still had a wooden handle, but the it broke and became loose inside hammer head. Russel Pritchard from the Beechworth Depot replaced the handle with a new metal one and put a dog leg in it It mainly branded forest produce cut in Mt. Pilot and Reedy Creek areas. The main logging contractors were Gordon Habeck from Chiltern and Steven Goldsworthy from BeechworthCrown mark one end (453) and Crows foot other endforest harvesting, forests commission victoria (fcv)

Decimal currency was spectacularly introduced in an overnight overthrow on 14 February 1966, but it took another 8 years before metrication finally arrived in the forest and timber industry. Eventually, the measurement of logs and sawn timber changed from imperial, and excruciating, measures such as super feet of sawn timber, billets and cunits (100 cubic feet) of stacked pulpwood and hoppus log volumes to simpler cubic metres. Measuring firewood was a particular nightmare. For example, there were standard chords, stove cords, kitchen cords, running cords, face cords, thrown chords, fencing cords, country cords, long cords, raummeter or steres (1m x 1m x 1m). A standard cord of firewood had a volume of 128 cubic feet, measured as a pile 8 feet long, 4 feet high and 4 feet wide (3.624 m3). And how about this for confusing…. in Victoria, an imperial or long ton (by measure) of green firewood was a stack 5 feet long billets (2 axelengths at 2′ 6″ each), one axelength high (2′ 6″) and two axelengths long (5 feet) equalling 62.5 cubic feet. For added befuddlement, there were three different sorts of tons: Imperial tons or long tons, American short tons and metric tonnes (spelled with two n’s). Not forgetting that a cubic imperial ton of firewood (40 cubic feet) which equalled 1.133 cubic metre. The metrication process began in 1974 and was completed by 1976 but the transition was not without its challenges along the supply chain for foresters, overseers, logging contractors, sawmillers, hardware stores and builders alike. Timber lengths changed from feet to metres but were still sold in multiples of one foot or 0.3 m (1.8, 2.1, 2.4, 2.7 etc) whereas a menacing lump of 4-Bee-2 transformed into a rather less colourful 100mm by 50mm. Measurement and calculations of area also became so much easier in hectares rather than complicated acres, roods and perches. The Forest Metriverter slide-rule was issued by the Forestry and Timber Bureau to make metric conversions easier.Forest MetriverterRoss Pennyforest measurement, surveying, forests commission victoria (fcv)

The Forests Commission developed the use of helicopters for aerial ignition from the mid 1960s. Bryant and May at Richmond worked with the Commission to develop a Delayed Action Incendiary Device. DAIDs as the were known, had an overall length of 180 mm, striker end length - 10 mm. Ignition end length - 80 mm, then a layer of high melting point wax (to prevent accidental ignition when rubbing together in transit). Both ends coated with a modified match head compound with safety fuse exposed length between coated match ends. There was a 17-second delay from when the small end was struck to an intense flaming of the large end, which lasted for 40 seconds. DAIDs were dangerous so were stored in a metal box outside the helicopter along with a disposable striker patch attached with a quick release pin to a special half-door. The first test was with a Bell 47G on 4 October 1967 and the first use, anywhere in the world, of DAIDs to backburn a large bushfire was undertaken in north eastern Victoria in February 1968. There was a crash of an FCV helicopter conducting aerial ignition near Wandiligong on 19 April 1978 with the tragic death of two forest officers and their pilot. The crash led to the immediate end of the use of DAIDs and the adoption of the safer Premo ping-pong ball incendiary machine which originally came from Canada but was modified at the Altona workshops. Overall, the development of aerial ignition techniques by the Forests Commission from the mid-1960s resulted in a steady climb in the area burnt each year…. peaking at 477,000 ha in 1980-81 and with an impressive 10-year rolling average of 220,000 ha around the time of 1983 Ash Wednesday Bushfires.Developed in Victoria for aerial ignitionLarge double ended match used for aerial ignition and back burning by dropping from a helicopterbushfire, forests commission victoria (fcv)

Logs were sold to sawmillers from State forest from 1 July 1974 in cubic metres (true volume). Previously sawlogs had been sold on the basis of Hoppus volume. This simple device with two rotating wheels enabled staff in FCV offices to rapidly calculate log volumes from measurements taken in the bush of log girth and length and recorded on paper log dockets. From the early 1980s automated systems became available with the advent of cheap electronic office calculators and simple computers. An early manual device that was superseded by electronic calculatorsOffice Device Twin rollers used to quickly and simply calculate true log volumes using measurements of girth and length. An allowance could also be made for pipe defects. The top roller was for larger diameter logs.forest measurement, forests commission victoria (fcv)

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. Wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Temperature and relative humidity have major impacts on fuel dryness and therefore upon the availability of fuel for combustion. A thermo-hygrograph measures and records both temperature and humidity. It produces a continuous record by drawing ink traces on a paper chart held in revolving cylinder. Humidity is measured by shortening or lengthening of specially treated human hair. Temperature is measured by means of a bi-metallic strip. This particular instrument is a seven day recorder. The instrument is driven by clockwork. Serial number 10186 which probably dates from about 1960. The chart indicates it was last used in March 1979.Used for bushfire research.Clockwork Thermo Hygro GraphCasella London 10186 Made in England Research Branch. Forests Commission Orbostbushfire, forests commission victoria (fcv), forest measurement

After the 1939 bushfires, the Forests Commission invested heavily in a radically new communications network. After suffering some inevitable delays due to the War, radio VL3AA switched into full operation in October 1945 proudly beaming out 200 watts across the State. But by today’s standards, the technology was primitive and the reception poor unless the user was on a high point somewhere. The radio signal was "line-of-sight" and bounced between fire towers and relay transmitters across the mountains back to the District offices. Rapid improvements in technology led to various models of bulky handheld portables with heavy batteries that always seemed to go flat. In fact, batteries were a constant impediment at bushfires. The more secure and versatile State Mobile Radio (SMR) digital trunk system came into operation in about 1995. Upgraded Tait Radios were purchased in 2014 after recommendations of the 2009 Bushfires Royal Commission. But it was the convergence of separate technologies such as 4G mobile phones, high-capacity and light-weight lithium batteries, Wi-Fi, the ever-expanding internet, cloud data storage, digital cameras, GPS, personal organisers and hundreds of supporting Apps into powerful smartphones and tablets which revolutionised bushfire communications from the mid-2000s.Portable UHF Radio with leather carrying case and strap. Charging station. Kyodo Model KC-1109 MOYHU Whitfieldbushfire, radios, forests commission victoria (fcv)

After the 1939 bushfires, the Forests Commission invested heavily in a radically new communications network. After suffering some inevitable delays due to the War, radio VL3AA switched into full operation in October 1945 proudly beaming out 200 watts across the State. But by today’s standards, the technology was primitive and the reception poor unless the user was on a high point somewhere. The radio signal was "line-of-sight" and bounced between fire towers and relay transmitters across the mountains back to the District offices. The more secure and versatile State Mobile Radio (SMR) digital trunk system came into operation in about 1995. Upgraded Tait Radios were purchased in 2014 after recommendations of the 2009 Bushfires Royal Commission. But it was the convergence of separate technologies such as 4G mobile phones, high-capacity and light-weight lithium batteries, Wi-Fi, the ever-expanding internet, cloud data storage, digital cameras, GPS, personal organisers and hundreds of supporting Apps into powerful smartphones and tablets which revolutionised bushfire communications from the mid-2000s.Base station radio with handsetRC-4B Amalgamated Wireless Australiabushfire, radios, forests commission victoria (fcv)

Dedicated phone lines were often connected between FCV District Offices and firetowers or local depots. These lines were activated by winding the metal handle to ring the bell at the other end of the line.Bakelite phone with handset and winder. Made of Bakelite.radios, forests commission victoria (fcv)

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. Wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Temperature and relative humidity have major impacts on fuel dryness and therefore upon the availability of fuel for combustion. The amount of fine fuel available can increase rapidly from nearly zero when fuel moisture content is more than 16% after rain or a heavy morning dew, to many tonnes per hectare as fuel dries out later in the day and the moisture content drops below 9%. This explosive escalation in the amount of available fuel can happen over a few hours on hot and windy days. A sling psychrometer is a simple device for determining air temperature and relative humidity. It contains two thermometers, one of which is covered with a wick saturated with ambient temperature liquid water. These two thermometers are called dry bulb and wet bulb. When the sling psychrometer is spun rapidly in the air, the evaporation of the water from the wick causes the wet bulb thermometer to read lower than the dry bulb thermometer. After the psychrometer has been spun long enough for the thermometers to reach equilibrium temperatures, the unit is stopped, and the two thermometers are quickly read. A psychrometric scale on the side of the instrument is then used to convert the dry bulb temperature TDB and the wet bulb temperature TWB into humidity information. The wet bulb temperature is approximately equal to the adiabatic saturation temperature. The thermometers fold back into the plastic handle when not in use. Used to measure temperature and relative humiditySling PsychrometerBACHARACH INSTRUMENTS - Pittsburg PAbushfire, forests commission victoria (fcv)

A prismatic compass is a common navigation and surveying instrument which was used extensively by the Forests Commission The compass most commonly used to run a traverse line. The compass calculates bearings of lines with respect to magnetic needle. A magnetic deviation correction was needed to convert the reading to a true bearing The compass could also determine angles between the traverse and waypoints (such as hilltop features). Commonly used for navigation. Largely replaced by modern GPS technology.Ex Army WW2 prismatic compass with leather case and strap. Rugged design and made of metal the internal compass plate floats on oil to help it stabilise The user lines up the direction of travel with the hair sightline in the fliptop cover and readings are taken through the viewfinder prism (hence the name).forest measurement, surveying, forests commission victoria (fcv)

The Forest Fire Danger Index (FFDI) was originally invented by the grandfather of Australian bushfire science, Alan Grant McArthur, during the 1950s and ‘60s. Alan published his landmark paper, “Controlled burning in eucalypt forests” in 1962. Leaflet No. 80, as it was known, proved a turning point for forest and fire managers across Australia. More importantly, Alan was very practical forester and wanted his work to be useful to people in the field, so after several iterations he came up with the now familiar circular slide rule called the Forest Fire Danger Meter (FFDM).  The Mk 4 version first appeared in operational use in 1967. Two Forests Commission staff, Athol Hodgson and Rus Ritchie, built on McArthur’s pioneering work and by applying their own practical experience, developed a modified version in the late 1960s called the Control Burning Meter which was better suited to Victorian forest conditions.Introduced to the FCV in 1970Control burning meterbushfire, forests commission victoria (fcv)

This pocket stereoscope was used to view a pair of separate and overlapping aerial photos as a single three-dimensional image. It was small and could be easily used in the field. Larger, mirror stereoscope were also available in some offices. The aerial images were used to map forest types, timber stands, new roads and tracks, firebreaks, boundaries of timber harvesting, plantations, bushfires, insect and disease attack and so on In 1928, the Forests Commission undertook its first major aerial photography project over 15,000 acres of forest which is said to be the first of its kind in Australia. During the Second World War, large areas of Victoria were photographed by RAAF and used to produce orthophoto maps. By 1945 aerial photography of 13,000 square miles (3.4 M ha) was completed, including much of the inaccessible eastern forests. The Forests Commission started developing its own small format photography in the early 1970s. Simple, cheap and rapid methods of obtaining photographs using 70mm and 35mm cameras were developed Small pocket stereoscope to interprete aerial photographs in the field Adjustable lenses on foldaway wire legsSokkisha Tokyoforest measurement, surveying, forests commission victoria (fcv)

An increment borer is a specialised tool to extract a core sample of wood tissue from a living tree. The tool consists of a handle, an auger bit and a small, half circular metal tray (the core extractor) that fits inside the auger bit. The core sample can be used to count the rings, to reveal the age of the tree and its growth rate.Increment borer. The central core is stuck. AGN Mattison - Sweden #4333forest measurement, forests commission victoria (fcv)