When the ground depresses down at the point of a volcanic vent after a volcano’s magma chamber has been emptied it is known as a caldera, and not a volcano crater. (https://www.universetoday.com/31143/volcano-crater/, accessed 04 March 2019) A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a large, special form of volcanic crater. A caldera collapse is usually triggered by the emptying of the magma chamber beneath the volcano, as the result of a large volcanic eruption.(https://www.sciencedaily.com/terms/caldera.htm)A volcanic vent, or depression on one side of Mount Franklin. mount franklin, volcano, volcanic vent, lalgambook

Colour photograph showing an air vent at the Ballaarat Mechanics' Institute (side entrance). ballaarat mechanics' institute,

The old brick building at Greensborough Primary School on Grimshaw Street. Built in 1879, this building is now heritage listed by the National Trust. This photograph shows an interior air vent.Digital copy of colour photographgreensborough primary school, greensborough state school

Typed letter from Town of Ballarat East Town Clerk, J. Gent, to the Registrar of the Ballarat School of Mines.ballarat east council, town of ballarat east, coat of arms

Colour photograph of a red brick woollen mill at Ballarat, known as the Sunnyside Woollen Mill, or the Ballarat Woollen Mill. ballarat woollen mill, sunnyside woollen mill, mount pleasant, chimney

Colour photograph of a red brick woollen mill at Ballarat, known as the Sunnyside Woollen Mill, or the Ballarat Woollen Mill. ballarat woollen mill, sunnyside woollen mill, mount pleasant, chimney

This item was donated by Colin Laurence Grey OAM. Colin was the driving force behind many of the displays at the National Vietnam Veterans Museum. He will be remembered for his expertise, and boundless enthusiasm for all things Australian. Colin organised teams of like-minded souls to bring home and restore many important historical aircraft. His success has been recognised and rewarded with an Order of Australian Medal 2000, and he is named in the Worldwide Who’s Who 2014-2015. Colin’s skills as an engineer, tool maker, boiler maker and organiser enabled him to restore steam trains, trucks, tanks, infantry weapons, various aircraft including a MIG-15 jet fighter and his largest project the Consolidated B-24 Liberator bomber. He even replicated two dinosaur skeletons for Museum Victoria. In 1989 Colin joined the fledgling B-24 Liberator Memorial Fund as Project Manager/Restoration Co-Ordinator with the task to build a volunteer organisation that could find the AUD$10m required, source parts and materials for the largest aircraft restoration in Australia. The B-24 program had 10 volunteers, 60 sponsors and an international support network that provided parts, tooling, aviation equipment and political support. Colin’s combined engineering, academic and logistical skills provided the basis for advancing the skills of a very disparate group of volunteers form all walks of life. Colin established links with Centrelink, Corrections Victoria, RMT Uni and the ADF to develop the skills base of many less fortunate individuals of all ages and backgrounds. Colin’s work in this area gained him an AOM (2000). He featured in an ABC Australian Stories program and was awarded a life membership of the organisation. Colin was a founding member and President of the Oceania Aviation Museum Inc. which was instrumental in the historic listing of the joint WW2 USAAC/RAAF facility at Werribee and the Preserve Point Cook Aerodrome Group. Colin developed best practice engineering and fund-raising programs for a volunteer group, the Phillip Island Aquatic Centre. Colin’s constant learning, curiosity, passion and contribution to all things Australian have been an inspiration and a great example to all of us. He will be sorely missed and fondly remembered.A cream coloured cardboard cover. Top right corner reads Australian Air Publication 7435.031-6. Royal Australian Air Force is above their insigna and the description of the manual us under this. the manual has three punch and tow metal staples down the left hand side.royal australian airforce - manuals, vent valve heater assembly

A dorade is a type of ventilator that allows air to move in and out of a vessel's cabin or engine room but baffles or screens within the box it is fitted to prevent the rain and seawater from getting inside. A Dorade was first seen in use on the "Dorade", an ocean racing yacht designed by Olin James Stephenson II and built in 1929. Since then there have been modifications to the original design. The yacht, Dorade, could have been named after the Mediterranian dorade fish.An early piece of marine equipment from the 1930s that still is in use today on smaller vessels to improve below-deck ventilation.Dorade vent cowl; a cast brass ventilator. A' J' shaped hollow brass cylinder with a wide open mouth twisted to the side. The inside is painted. A Dorade vent is normally fitted into a chamber box but this was not included.Noneflagstaff hill, warrnambool, maritime museum, great ocean road, shipwreck coast, ventilator, dorade, vent, cowl, ship fittings, maritime equipment, ventilator box, dorade vent, collector box, cowl vent, olin james stephenson ii

"Pressure equalising vent"equipment/gear, ballarat rsl, ballarat

Blue -print of mechanical ventilation system for Assembly Hall by K.O. Wood, Mechanical Engineer. Dated 9.7.'46."Vent. small scale" and diagram in crayon and pencil on versok.o. wood, ventilation, victoria department of public works, burnley gardens

Metal cylindrical base to store kerosene. Metal "arch" connected to the base and holding the top metal vent in place. The top vent and bottom vents have wire metal holding the glass lens in place. There is also a wire handle Lanora Australia, on baselamp, lantern, light, kerosene

The vent cover comes from the Falls of Halladale, a four-masted iron-hulled barque built in 1886 for the long-distance bulk carrier trade. The vessel was built for the Falls Line (Wright, Breakenridge & Co., Glasgow, Scotland) at the shipyard of Russell & Co., Greenock on the River Clyde, she was named after a waterfall on the Halladale River in the Caithness district of Scotland. The ship's design was advanced for her time, incorporating features that improved crew safety and efficiency such as elevated bridges to allow the crew to move between forward and aft in relative safety during heavy seas. The Falls of Halladale was the seventh vessel in a series of eight similar iron-hulled sailing ships, all built by Russell & Co and all named after waterfalls in Scotland. The Falls of Halladale was preceded by the Falls of Clyde (1878), the Falls of Bruar (1879), the Falls of Dee (1882), the Falls of Afton (1882), the Falls of Foyers (1883) and the Falls of Earn (1884). The Falls of Halladale was followed by a sister ship, the Falls of Garry (1886). The Falls of Clyde is afloat today and is a major attraction at the Hawaii Maritime Center in Honolulu. The Falls of Halladale is best known for her spectacular demise in a shipwreck near Peterborough, Victoria on the shipwreck coast of Victoria, Australia. On the night of 14 November 1908, she was sailed in dense fog directly onto the rocks due to a navigational error. The crew of 29 abandoned ship safely and all made it ashore by boat, leaving the ship foundering with her sails set. For weeks after the wreck, large crowds gathered to view the ship as she gradually broke up and then sank in the shallow water. Soon after the accident the ship's master, Capt. David Wood Thomson was brought before a Court of Marine Inquiry in Melbourne and found guilty of a gross act of misconduct, having carelessly navigated the ship, having neglected to take proper soundings, and having failed to place the ship on a port tack before it became too late to avoid the shipwreck. Capt. Thomson's punishment included a small fine and he had his Certificate of Competency as a Master suspended for six months. Today the Falls of Halladale is a popular destination for recreational divers. The wreck is easily accessible by scuba divers about 300 m offshore in 3 to 15 m of water. The hull lies on its collapsed starboard side. Some of the original cargo of 56,763 roof slates remains at the wreck's site along with corroded masses of what used to be coils of barbed wire. Twenty-two thousand slates were salvaged in the 1980s and used to provide roofing at the Flagstaff Hill Maritime Village in Warrnambool. An anchor that was recovered in 1974 is on display in the village. The pulley sheave is significant as a salvaged item from the Victorian heritage-listed Falls of Halladale wreck. As an artifact from the wrecked ship, it helps us to remember today the story of the wrecking and is an important reminder of a marine incident in Victoria's maritime history. Vent cover taken from the top of an iron Bollard. Recovered from the wreck of the Falls of Halladale. noneflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, vent cover, falls of halladale, russell & co.

Borough of Queenscliffe Bathing Boxes had to be registered to a particular rateable property. Bathing Box No. 24 belonged to a property in Simpson Street, Point Lonsdale The Bathing Boxes at Point Lonsdale were loaded onto trolleys and taken back to the property during winter so they were not destroyed by the wild weather. Eventually they became garden sheds in the back yards of residencies.Bathing Box No. 24 is one of a very few still remaining due to recent home extensions.Weatherboard with Galvanised Iron Roof with Wooden Slatted Air Vent.

Very Dinted Pad Locked Handle Air Grate for VentingMotor Sprit Highly Inflammable

Leather boxing gloves used for hand protectionIManufactured and sold by Holden and Frost for sporting undertakingsLeather outer fabric lined with vented palm boxing glovesleather, boxing, gloves

Part of the "Kevin John Herdman", No. 397661 Collection. See cat No. 5942P or details of his service.Green plastic waterproof coat with belt. Belt has a buckle for adjustment. Mesh vent across back covered with a flap. Two vents at shoulder level on front. Metal vent holes under arms. Front closed with buttons. Two side pockets. Sizing label on inside neck. Manufacturers label on inside left.On sizing label: 40L, CLASS 8405, 66-018-1274, 8305-66-018-0450'. Stamped on sizing label: 'BRK, 70, 70". Handwritten on sizing label: 'K. HERDMAN'. On Manufacturer's label: 'M.PENNISI, CLOTHNG CO. PTY LTD, VICTORIA, 1970 (upwards arrow ^).accessory, waterproof coat, australian army, kevin john herdman

Plaster base and top. Middle section of tin. Tin has vents all around. Cylindrical design. Top is slightly dome shaped. Base sloped outward. Old roof air vent - old ventilator.Pepper's improved patent ventilator. 'PEPPERS'

Port of Portland Authority archivesFront: (no inscriptions) Back: Prime Minister Sir Robert Menzies/ inspecting Harbour works/ 18th July 1958 (pencil, top centre) 23 1/2 cms/ Pinned Top + Bottom/ Flush sides (circled, pencil upper centre) 85 SCREEN (pencil centre) SULLIVANS STUDIOS/ 84 PERCY ST., PORTLAND/VICTORIA/PHONE: PORTLAND 680/ When Ordering further Prints, Please quote:/ Ref. No. 7629 Position ...... (purple ink stamp with pencil, lower right)port of portland archives, sir robert menzies, prime minister, 1958

Camouflage pattern cotton fabric six panel peaked cap issued to Lt Gen Brian “Ash” POWER. Camouflage fabric cap with vent holes, detachable badge above peaked brim.lt gen ash power, army peaked cap

Dual airbag display from 2001 VX Commodore from Holdens Experimental Engineering DepartmentProduce by HoldenWraparound plastic layout with a central instrument cluster, venter console facia and integrated controlsholden, vx commodore dashboard

leather boxing glove stuffed with horse hair, red stitching air vent in centre of palm.recreations, sports, boxing, glove, leatherwork, stitched

What device converts AC to DC? rectifier A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification, since it "straightens" the direction of current. The unit was used at Ballarat School of Mines in the Maths, Science and Physics Departments.Grey metal unit with Dials on the front and vents at the back. Handle for carrying. Two switches for turning on and off. Yellow sticker - SMB - with number 116071. Engraved on back - S.M.B.. Maths / Science / Physics Sticker on cord indicating inspection of unit - 13/04/2005. Tag Number - 032735alternating current, direct current, ac, dc, rectifier, electrical, ballarat school of mines, science, maths, physics

This vehicle is an example of the last Ute produced by GMHProduced and sold by GMHLight My Fire (Orange) body black tray body, air vents on bonnet, black Grille.Chrome Holden emblem on Back tail gate and grille centre, series II Both sides tail gate. LS3 6.2 litreV8 0n front bumper LHS SS both side rear quarter panels.vehicle, ute, holden ss

The Special Sport Sedan is a rear wheel drive saloon (sedan) motor car with a front located engine, manufactured by Buick. The Special Sport Sedan is part of Buick's Series 40 family of cars. It is powered by a naturally aspirated engine of 4.1 litre capacity. This unit features overhead valve valve gear, in line 8 cylinder layout, and 2 valves per cylinder. It has an output of 107 bhp (108 PS/80 kW) of power at 3400 rpm, and maximum torque of 275 N·m (203 lb·ft/28 kgm) at 2000 rpm. A 3 speed manual transmission transmits the power. Buick scored another first in 1939 when it became the first company to introduce turn signals, which did not appear on other car brands until almost a decade later.[ All 1939 models also had a steering column mounted shift lever1938 Buick Sedan . Bodied in Australia by GMHBurgundy 4 door rear wheel drive sedan, white wheels. Spare wheel holder both sides, side lights. Steel front and back bumper bars, steel strip around car Buick badge on front grille. Bonnet vent with "SPECIAL' badge. Two Buick badges behind front bumper, Buick badge on boot.automobile, bodied, car, buick

Military style bush hat, green material with grey material lining in crown. Two metal vents on crown.uniforms - army, costume-male-headwear, passchendaele barracks trust