non-fictionTime line of metrication in Australiametrication

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). The most common way to measure tree diameter is to place a calibrated tape around the stem at breast height. It’s simple, but can be slow, particularly if the scrub is thick, or if there are heaps of trees. A tree caliper is another quick method of estimating DBHOB. Wooden tree measuring calipersMeasurements are in inches (pre metrication in 1974) A crown faint crown mark (331) and crows foot is visible on one end forest measurement

Metrication in Australia took place between 1970 and 1988. Before then, Australia mostly used the imperial system for measurement. This tea-towel is a handy reminder of conversions.This item was designed to assist people to understand the conversion and as a reference to make conversions from imperial to metric. It is in mint condition (never used)Linen tea-towel. Cream background with blue, red and black print.Conversion tables for metric stencilled on tea-towel.imperial measurement, metric measurement, metric conversion, tea-towels

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 The chain was later superseded by steel ribbon tape.The 66 foot long brass Gunter's Chain is divided into 100 links (each 7.92 inches long), and marked off into groups of 10 by shaped tags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)

Stone mileposts dating from the 1870s are found on the Glenelg Highway. Stone and iron mileposts are now a rarity, and have remanining markers have become a tourist attaction in many smaller towns with remnant markers. The stone mileposts on the Glenelg Highway are listed on the Victorian Heritage Reigister as being significant to the State of Victoria. Their primary purpose is to inform the travelling public of distances and directions to various destinations. The stone milepost in the current City of Ballarat are located on the Glenelg Highway (between Ballarat and Scarsdale), Smythes Creek and Delacombe, and have been registered by Heritage Victoria, (HO155) Other stone mileposts are located In Golden Plains Shire at Smythesdale (Victorian Heritage Register H1701) Metrication in Australia caused former mile markers to be gradually replaced with 10 km markers on highways and country roads, which are referred to as "kilometre plates".Colour photograph of a stone mile post on between Ballarat, Scarsdale and Lintonmilepost, mile post, scarsdale, linton, ballarat, mile marker, stone milepost, milestone

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)