Manufactured in the 1960s, this mobile emergency telephone exchange was fitted into a caravan. Part of the Shepparton Division State Disaster Plan, the caravan could be towed to areas affected by disasters to enable communications to recommence. The caravan remained in service until approximately 1974.Mobile infrastructure plays an important role in Australian communications, owing to the often remote and hostile environments in which Australians live and work. Exchanges such as this facilitated phone calls in the aftermath of an emergency, particularly for hospitals, police and other emergency services. Today, Mobile Exchange on Wheels (MEOWs), Cell on Wheels (CoW) and Satellite Cell on Wheels (SatCOW) - which provide temporary landline and broadband services, mobile phone coverage and service in areas without communications infrastructure respectively - are a critical part of emergency response procedures for natural disasters such as fire and flood. Though technology has progressed, the need for rapid service in remote areas remains a present concern of the communications service providers in Australia. This mobile service infrastructure is historically significant as an early example of a service which has evolved over decades, yet is still needed today. The exchange, as a representative example of a vehicle which would provide early-response in a disaster, is socially significant as a facilitator of critical communications needs in devastated communities: access to emergency services and contact with family and friends. The exchange itself, intact from its period of use, provides an insight into technology of the 1970s.Mobile emergency exchange housed in a caravan trailer on 2 wheel base, duralin body, steel tow bar, Caravan divided into 3 sections; the exchange room; the relay room and the main frame room. The exchange room contains 3 switchboards, a folding table, cupboards, benches and switch rack (.1). table (.2), steel bar for attaching the table (.3), back boards of switchboards (.4-.6), switches (.7-.16), box of switches (.17). There is a wall phone magneto, 300 type handset on wall and 2 skylights with wire screens. .11? hat pegs and shelf; there are 2 fluorescent tubes for lighting, all in exchange section. The floor is covered with 2 tone grey tiles and there are wire mesh on outside of windows and a geometric curtain inside behind switch rack. There is a flywire screen door as well as exterior door. The relay room has a sectioned door so half can open at a time. Room contains a cupboard with folding bench top beneath a curtained window. The opposite wall has a bank of batteries and transmission condensers; there is a shelf above window, one fluorescent tube and fuse boxes. Tiles on floor also. The main frame room contains many metres of coiled black covered cable, a black covered magneto wall telephone with 300 type handset; grey plastic jumper cords, a rack of termination points and wire with wasp nests attached. There is a small iron step under door, a fluorescent tube on wall and 3 hat hooks. Roll of Paper Handtowels (.18), cord and handle (.19), red exchange cords and plugs (.20-.22), plastic aluminium runners (.23,.24), headset (.25,.26), logbook (.27), battery readings (.28), box containing papers circuit drawings etc (.29-.93), paper lists off wall (.94,.95). Books, record books etc (.96-.103). Manila folder (.104) containing circuit drawings (105-.124). Wooden drawer (.125), metal drawer containing subscribers master cards, record of faults cards, particular switchboards connected, Junction line cards (.126). Box of valves (.127), box of clamps (.128). Box of 2000 type rack fuses, red 1 1/2 AMPS, black 3 AMP, blue 1/2 AMP (.129). Box of sleeves for covering wire joints (.130), plastic beakers (.131,.132), soap (.133), box of white plastic squares (.134), time switch "Venner BF/43 time switch" Made in England (.135), box of bolts, knobs etc (.136), box of switchboard number indicators (.137), fuse (.138), fuse wire (.139), football card (.140). Box of cartridge fuse 6 AMP (.141). Envelope of drawing pins, rubber bands (.142), black plastic, paper tape centres (.143-.152), metal plug (.153), 2 signs "Beware of vehicles" (.154-.155). Paper listing Naringal East automatic conversion (.156). Green Commonwealth of Australia note pad (.157). Wiring plug for tail lights (.158). Black fuse plugs (.159,.160). Box of bolts (.161). 2 sections of blue plastic coated wires (.162,.163). Gloves used for working on batteries (.164-.167). Wasp nests (.168,.169). White fuse (.170). Photographs of van in use (.171,.172)..1 on front: "ANOTHER / MOBILETRAIL / PRODUCT" "MAX SPEED / 25MPH" "TRAILER BRAKES / --- / " On sides: "EMERGENCY TELEPHONE EXCHANGE" "NO 1" "PMG" "TCQ / GROSS 250 / TARE 182 / LOAD 162" "6" "COUNTRY BRANCH / NORTH REGION / [SHEPPARTON DIVISION]" "LAW'S SIGNS" "Telecom Australia" On back: "DANGER / LONG LOAD" "MQA 3787" .133: "FIR OIL" "AUSTRALIA"mobile telephone exchanges, mobile telecommunications trailers, trailers, transport, natural disaster, black saturday, bushfires, floods, emergency communications

Used at Ballarat School of MinesThe cover is a red brown colour with the title on the spine and the publisher Longmans & Co printed near base of the spine. The book has 496 illustrations throughout with some pull out plates. Pages 514.On the inside cover it is stamped with The School of Mines Ballarat and written in pencil is 1914 and E K.compound engines, thermodynamics of gases, properties of steam, temperature-entropy diagrams, superheated steam, steam-jacket, feed-water heaters, crank-shaft, flywheels, corliss engine, steam turbine, condensers, friction of engines, steam-engine, william ripper, steam

This book was owned by Alf Gresham Johnston who was a former SMB mining student from the Ballarat School of Mines. He died at the age of 29 during military service in South Africa. The following is from the Federation Uni Honour Roll at http://federation.edu.au/about-us/our-university/history/geoffrey-blainey-research-centre/honour-roll/j/alfred-gresham-johnston-1872-1901 The October 1901 Ballarat School of Mines (SMB) Students Magazine reported 'Alf. Johnston's gone. The news came as a shock to all of us at the school. He who was with us a few short months ago, in all strength of sturdy manhood, has met a soldier's death in South Africa, and we sincerely mourn his loss…. His heart was in the school, and he did his best to further its interests … His last act on leaving Australian shores was to send a telegram from Albany to Prof. Mica Smith, to whom he was warmly attached, wishing the School and all connected with it "Good-bye". In his short, all to short, life of 29 years, he had more adventure than falls the lot of most men, and possibly the spirit of adventure, and also, of duty, prompted him to throw in his lot with the "colors," and leave for the front. The news of his death comes to us with added weight of sadness when we remember that he was one of the organisers of the School entertainment last year to help swell the fund for the erection of a statue to fallen Victorian soldiers.'A small red book with a double black line bordering the front cover, with the text Longmans Elementary Science Manuals on the bottom of the cover. On the back cover is an L&Co logoOn the title page is the inscription of the original owner of the book Alf G Johnston School of Mines Ballarat 1899. Inside the front cover and on page 19 is the stamp of the School of Mines Ballaratalfred johnston, steam engine, compound engines, condensers, heat, horse-power, transfer of heat, combustion of fuel, saturated steam, cranks and crank shafts, watt governor, boilers, alf johnston, william ripper, boer war

Formerly part of the Ballarat School of Mines libraryA blue book with the title printed in gold on the spine, and the publisher "Longmans" printed in gold at the base of the spine. It has 503 illustrations throughout. It has two loose pages of plates in a sleeve inside the back cover and some pull out plates throughout. 841 pagesIt is stamped with The School of Mines Ballarat near the front and back pages, as well as some throughout the book.steam engine, properties of steam, flywheels, condensers, thermodynamic principles, energy diagrams, engine cycles and efficiencies, brake horse-power, steam in the cylinder, multiple expansion engines, valve gears, governors, crank, corliss and drop-valve engines, steam turbines, turbine performance, steam