Photocopy of part of City of Ballarat's Mayor's Report for 1966 - 1967. Originals held in the Ballarat Library. Three pages covering trams, railways, electricity, Y112 locomotive and photograph of locomotive. Images added 19-12-2016.trams, tramways, city of ballaarat, trams, railways, civic history

The Central Red White and Blue Gold Mine was Bendigo's leading gold mine from 1910 - 1913. During the mine's operation, the main shaft was sunk 670 metres, and retrieved over 2500KG of gold. The Central Red White and Blue Gold Mine was located on the corner of Chum St and Honeysuckle St in Golden Square.black and white photo - poppet legs, corrugated iron buildings, round brick chimney stack, 3 cylindrical metal tanks, picket fence across from left to RH side of building, Electricity pole at centre..bendigo, gold mining, gold, central red white and blue gold mine, chum street, honeysuckle

BHS CollectionBendigo Advertiser ''The way we were'' from 2002. Power house: the State Electricity Commission of Victoria building on the corner of Hargreaves and Williamson streets. Built by Robert Poulston, the site is now Australia Post. The clip is in a folder.newspaper, bendigo advertiser, the way we were

This photo is one of a collection of photos taken during Alan Niemann's - Drainage-Road Making Scheme.Two black and white photo of the northern and southern ends of Haig Avenue, Edithvale. The road is unmade with grass growing on the road, is rutted with large puddles, houses line both sides and electricity poles are both side of the road. unmade street, aspendale, alan niemann, drainage-road making scheme, haig avenue, edithvale

Although the Kiewa Hydro-Electric Scheme was first proposed in 1911, construction did not commence until 1938. As part of the push to cut electricity costs and diversify supply, the Victorian Government (circa 1930) initiated the conversion from primarily brown coal supply to hydro – electricity. Field investigations during the 1940’s resulted in a new proposal for a scheme that had more than double the capacity of the 1938 scheme. The Kiewa Hydroelectric Scheme became the largest scheme of its kind in the State Of Victoria and the second largest scheme in Australia. The number of personnel involved in the planning and construction of the scheme increased dramatically. During the late 1940’s, most activity centred around the construction of the West Kiewa Power Station, Rocky Valley Reservoir, McKay Creek Power Station and the Bogong Creek Aqueduct.A common thread across all the larger hydro scheme constructions was the need for workers, both qualified and unqualified who came from around the world seeking a new life for themselves and their families. New accommodation and facilities were required for the army of workers engaged in construction in often remote and wild areas. The SEC had a high demand for timber, and set up the first of a number of sawmills at Bogong Creek in 1939 and set up the first hardwood logging in the headwaters of the Kiewa River. These new ‘towns’ such as Mt Beauty and Bogong, survived, serving the needs of operational personnel and their families, and expanding with growth of new industries. Mount Beauty, and to a lesser extent Bogong, are among these places. Large A3 size spiral bound display folder containing 21 pages of photocopied black and white photographs of various aspects of the early days of the Kiewa Valley Hydro-electric scheme including equipment, various work sites and photographs of workers and their families. 1-Mt Beauty Pondage inlet-Regulating weir 2-Langfords Gap Basalt Hill-Tunnel in quarry face.3-Rocky Valley Camp-from Engineering Office 4-Basalt Hill tunnel portal 5-No 1 Pressure Shaft Works Bench 6-No 1 Power Station 7-Overturned haulage wagons on the side of an embankment 8- Group of workers dressed in wet weather gear inside a tunnel 9-Workmen and vehicle in tunnel 10-Howman’s Gap campsite at 4,150 feet 1-1954 – Mt Beauty Pondage inlet – Regulating weir Page number 29 2-28/10/54 – Langfords Gap Basalt Hill – Tunnel in quarry face K7860 Page number 30 3-STATE ELECTRICITY COMMISSION OF VICTORIA Date: 17.8.55 Time: No K8132 Kiewa Hydro Electric Works ROCKY VALLEY CAMP – FROM ENGINEERING OFFICE Page number 31 4-28/10/54 – Basalt Hill tunnel portal K7859 Page number 32 5-No.1 Pressure Shaft Works Bench 5.7.56 Page number 33 6- No. 1 Power Station 26.4.59 Page number 34 7- No markings Page number 35 8-No markings (Wooden board on ground printed with - POLAR A.N.GELATINE DYNAMITE “75” DE 28.8.40) Page number 36 9-No markings Page number 37 10-Howman’s Gap campsite at 4,150 feet Page number 38 secv; kiewa hydro electric scheme; mt beauty; bogong; construction area

Megger as the device was called, is in fact its brand name. It is a device that supplies a DC (direct current as per car batteries) voltage to enable testing of electrical apparatus. This particular device produces 250volts DC when the handle is turned vigorously. If an electrical device, such as a kettle or toaster, blew a fuse or tripped a circuit breaker, when switched on, then it must be checked electrically before any more use. Following the repair of the faulty item a megger would be used to check if either of the AC 240volt plugs leads were touching the metal case (earth). The output leads of the megger would be connected with one to the earth (metal case) and the other to each of the power connections in turn. A good megger reading of 50,000 ohms (resistance) would enable the device to be returned to service. A reading of zero ohms resistance would mean that it would again blow a fuse, and was therefore unsafe to use. In the electrical industry e.g. the former State Electricity Commission, a megger would be used to test lots of similar item in sequence. Because of the vigorous job of winding the handle, two persons were often used to save time. One would crank madly whilst the other shifted the leads. This particular megger is of a small voltage, but other meggers are bigger and have a few ranges of DC voltages able to be selected. The optimal megger for large Generating machines was motor driven megger. This was applied to the device being tested for a duration of approximately 30 minutes with reading of the resistance taken at regular intervals.All equipment belonging to the State Electricity Commission of Victoria was labelled with a metal plaque attached to it. The SECV constructed the Kiewa Hydro Electric Scheme in the Upper Kiewa Valley and on the Bogong High Plains. The scheme began in 1938 and finished in 1961 when this megger was used and also possibly later as the SECV remained to maintain and operate the Scheme. This megger is of significance in relation to the advancement of technology.A rectangular box in dark brown bakerlite casing. It has an agent's plaque fixed to the left of the face and on the right is the marker's recessed stamp. In the middle in a transparent window so the level of ohms can be read. The front also has two recessed fixing knobs in black. On one side is a crank handle with a knob that lifts up and is turned vigorously to create the voltage. The back has four recessed screws and four small leather pads. There is a hole on each side to insert wires. There are two copper insulated wires. The SECV Plaque states: State/Electricity Commission/of/Victoria/ Electrical Engineer's Section/ No.1747 The Agent's Plaque states: H. Rowe & Co. Pty Ltd/Melbourne & Sydney/Sole Agents/in Australia for/Evershed & Vignoles Ltd Maker's states: 500 volts/Megger/Regd Trade Mark/Made in England/Patent No/400728electrical meters, electrical equipment, fuses, safety, state electricity commission of victoria, mt beauty, bogong village

This photograph was taken during construction of the Rocky Valley Dam and wall. Work was commenced in early 1947 but had to be suspended during winter and then resumed in October. Work continued in 1948 with the establishment of work facilities and, at the dam site, the river was diverted through a temporary pipeline. Rocky Valley and associated spillway and outlet works were completed in 1959.A pictorial record of the construction of the rock and earth filled dam wall at Rocky Valley. Shows the extent of the project undertaken and the level of importance of the project as indicated by the large representation at the parliamentary party visit on 15/4/48.Photocopy of black and white photograph of parliamentary party visiting Rocky Valley Dam site 15/04/1948Typed on the bottom of photocopy - State Electricity Commission of Victoria. Date: 15-4-48 Time: 4.30pm No: K4397. Kiewa Hydro-Electric works. Parlimentary Party at Rocky Valleyrocky valley dam, parliamentary party, secv

Typed single sided foolscap page headed '3', details history of trams and extension to track post 1934 when State Electricity commission of Victoria had control of Bendigo Trams. Has been folded across the middle.person, individual, basil miller

Image of Hargreaves Mall, showing McCalmans, McArthurs Shoes, Treasureway, Electricity building (cnr. Williamson and Hargreaves) and Town Hall in distance. Excavation work evident. On back 'Hargreaves St. Mall looking east 14/2/82'place, bendigo, hargreaves mall, bendigo, hargreaves mall, 1982

Although the Kiewa Hydro-Electric Scheme was first proposed in 1911, construction did not commence until 1938. As part of the push to cut electricity costs and diversify supply, the Victorian Government (circa 1930) initiated the conversion from primarily brown coal supply to hydro – electricity. Field investigations during the 1940’s resulted in a new proposal for a scheme that had more than double the capacity of the 1938 scheme. The Kiewa Hydroelectric Scheme became the largest scheme of its kind in the State Of Victoria and the second largest scheme in Australia. The number of personnel involved in the planning and construction of the scheme increased dramatically. During the late 1940’s, most activity centered around the construction of the West Kiewa Power Station, Rocky Valley Reservoir, McKay Creek Power Station and the Bogong Creek Aqueduct.A common thread across all the larger hydro scheme constructions was the need for workers, both qualified and unqualified who came from around the world seeking a new life for themselves and their families. New accommodation and facilities were required for the army of workers engaged in construction in often remote and wild areas. The SEC had a high demand for timber, and set up the first of a number of sawmills at Bogong Creek in 1939 and set up the first hardwood logging in the headwaters of the Kiewa River. These new ‘towns’ such as Mt Beauty and Bogong, survived, serving the needs of operational personnel and their families, and expanding with growth of new industries. Mount Beauty, and to a lesser extent Bogong, are among these places. Large A3 size spiral bound display folder containing photocopied black and white photographs of various aspects of the early days of the Kiewa Valley Hydro-electric scheme including equipment, various work sites and photographs of workers and their families. 1-Breakdown in Circuit Breaker (Isolating Contacts) 2-Big Hill Bench- Site of No 5 Devlopment 3-No 1 Power Station 4-No 1 Pipeline, Anchor No 8 5-Push Dozing-RD8 Tractor 6- Tractor and driver at work 7- Workmen in unnamed tunnel 8- Front page of Journal of SECV Vol 15. Photograph of No 1 pipeline viewed from McKay Portal 9-Rocky Valley Dam Core Wall 10-Workmen working inside tunnel loading rocks into a rail truck. 1-Breakdown in (generator) Circuit Breaker (Isolating Contacts) Handwritten underneath (This is not a picture of any part of a generator. It is a circuit breaker Signed Ron White Ron was the Principal Hydro Engineer of the SEC Kiewa Scheme Page number 39 2-Big Hill Bench – Site of No. 5 Development (abandoned) Page number 40 3-No 1 Power Station Page number 41 4-No. 1 Pipeline, Anchor No. 8 Page number 42 5-Push Dozing – RD8 Tractor, 12 cubic yard Carryall and FD Cletrac Tractor Page number 43 6-No marking Page number 44 7-No marking Page number 45 8-Journal of State Electricity Commission of Victoria SEC Vol 15 No… April-May, 19… No 1 Pipeline-A view from McKay Portal G Hempenstall and D Sutton stiffening pipe section for transport during construction (….indicates missing text) Page Number 46 9-Rocky Valley Dam Core Wall Page number 47 10-No markings Page number 48 secv; kiewa hydro electric scheme; construction area; power stations; reservoirs; aqueduct; mt beauty; bogong

Lanterns were used for light when electricity wasn't available.Used in the Kiewa ValleyLight grey spirit lantern."Tropic / uk2 / Tropic", "Made in England" ,"Chalwyn"lantern, chalwyn tropic

Arc theatre lights produced light for performances before electricity.Metal theatre light with hinged opening on side, and hole in the front and bottom. It is thought to be an arc theatre light. Remnants of maroon paint with gold trim remain. There is a fixture on the side, most probably to attach it to a wall or stage. theatre, light, lighting, entertainment, arc theatre light, carbon light

MEYER COLLECTION - FALLS CREEK PHOTOS In 1947 a determined group of like-minded State Electricity Commission (SEC) staff including Ray Meyer, the chief surveyor of the Kiewa Hydro-Electric Scheme, had a common interest that revolved around the skiing potential of the snow-covered high plains which included what is now the resort of Falls Creek. The six SEC employees, Toni St Elmo, Ray Meyer, Jack Minogue, Lloyd Dunn, Adrian Ruffenacht and Dave Gibson (together with their families) banded together to secretly build a 'hut' that was the first ski lodge at Falls Creek. Using a road built in 1930s to gain access to Falls Creek, their hut project was carried out in secret as efforts by other skiers were blocked by H.H.C. Williams – the engineer in charge of the Hydro Scheme. In 1946 Ray Meyer made a trip to the Lands Office in Melbourne. He came away with a 99-year lease on three acres that was ideally suited for a hut designed by Lloyd Dunn. Adrian Ruffenacht (Design Engineer for the KHS) had suggested where the group should build because of easy access to a spring for water. Much of the building material required was scavenged from derelict huts on the high plains. Due to the need for secrecy, the determined group worked on the hut in the evenings and weekends to avoid detection. During the building period the group had met at Echidna Rock (now known as Eagle Rock) where Skippy St Elmo announced, "This is my favourite ‘Skyline’.” And so the first lodge in the area at Falls Creek Ski Resort came into existence. With the development of the International Poma in the 1970s, the Skyline Lodge, which was sited between the ski-lift’s pole one and pole two, was demolished. However, the legacy of Ray Meyer, Toni St Elmo, Jack Minogue, Lloyd Dunn, Adrian Ruffenacht and Dave Gibson and Skyline lives on in the vibrant atmosphere of Falls Creek Resort. The MEYER COLLECTION documents developments on the Kiewa Hydro Scheme and their life at Falls Creek from the mid 1930s to 1960s.These images are significant because they depict aspects of the life of a pioneering family of Falls Creek and the founders of "Skyline", the first lodge at Falls Creek.A black and white image taken near Wallace's Hut.The hut was built in 1889 and is probably the oldest surviving hut on the high plains of north-east Victoria. The State Electricity Commission used the hut from the late 1920s until the early 1940s to collect data on precipitation for possible future hydroelectric works. Toni and Skippy spent their first years on the mountain living in Wallace's Hut.falls creek, bogong high plains, wallace's hut

Kerosene irons were used c1930 - 1950 especially where electricity wasn't available. Shelite was another fuel that could be used instead of kerosene. The advantage of the kerosene iron was that it didn't require a stove to be lit (especially in summer) to heat the iron and it didn't require electricity.Residents in the Kiewa Valley used kerosene irons.This black iron is made of cast iron with a steel base and a black wooden handle. This Comfort iron has a ball shaped container with a screw-on lid to hold the fuel (kerosene or Shelite). At the bottom of this ball is a pipe going down then meeting another pipe at right angles to it leading into the iron. At the pipe junction there is a handle on a screw to limit the amount of fuel. The Kerosene would flow through this pipe. There is a filler plug air stem on top. This is a self-heating iron.Comfort iron / Self Heating Comfort Iron MFD by / National Stamping and Electric Works / made in U.S.A. Chicago iron, domestic, laundry, pressing clothes, household, kerosene, shelite

The State Electricity Commission of Victoria's Home Advisory Service prepared this collection of recipes. They also assisted with advice and information on the best use of electricity in the home. The S.E.C. sold electrical appliances at their showrooms, one of which was located in Mt Beauty where this booklet came from.The S.E.C.V. constructed the Kiewa Hydro Electric Scheme employing many workers. They built the townships of Bogong and Mt Beauty and assisted with the infrastructure required to support the influx of population. In the Mt Beauty shopping centre, one of the shops was the S.E.C. Showroom which sold electrical appliances and gave advice on their use along with recipe booklets for cooking on the new electrical appliances.Small 12 page booklet with soft cover and two staples binding it. Cover has coloured photos of plates of food with the title in green at the top.recipes. christmas. state electricity commission of victoria. sec home advisory service. electrical appliances.

The KVHS rotates its displays in the Mt Beauty Museum. These topics are researched and give a deeper insight into the chosen topic.A frosted white plastic tub holding blue plastic folders each with information and photos of each of the temporary displays that the KVHS has displayed in the Mt Beauty Museum. These include: 1. And Then There was Light 2. A Woman's Work is Never Done 3. Bogong Village - Camps 4. Cross Country Skiing 5. Electricity: Watts the Story 6. Here Comes the Bride 7. High Country Cattlemen 8. Indigenous People 9. Mt Beauty - Early; 10. Mt Beauty Sports 11. Not All Tea and Scones - C.W.A.12. Old School Days 13. Tawonga District General Hospital 14. The Buffalo Lodge 15. The Dairy Farm 16. Tobacco in the Kiewa Valley 17. What Makes our Community Great? Clubslight, women's work, bogong village, cross country skiing, electricity, weddings, cattlemen on the high plains, indigenous australians, mt beauty, c.w.a., schools, tawonga hospital, buffalo lodge, dairy farming, tobacco in the kiewa valley, community clubs

Junction Dam was part of the Hydro Electricity Scheme during the 1940'sState Electricity Commission (S.E.C.V.) construction of the Kiewa Hydro Electric SchemeBlack and white photograph of Junction Dam construction. View from upstream.junction dam, bogong, secv

Junction Dam was part of the Hydro Electricity Scheme during the 1940'sState Electricity Commission of Victoria (S.E.C.V.) construction of the Kiewa Hydro Electric SchemeBlack and white photograph of Junction Dam formwork constructionjunction dam, bogong, secv

One of a series of recipe books published by the State Electricity Commission of Victoria.16 p. black print on white papernon-fictionSEC tested recipes No. 16recipes, state electricity commission of victoria, sec

This particular lamp was made for the dinner table or "parlour". This was the most effective indoor lighting before electrical lighting was introduced in the 1940's. These table lights would have still been used after this time as emergency lighting during electrical power shortages (outages). These emergency lighting lamps, including candles, were eventually replaced by battery power. The Kiewa Valley was supplied by electricity well before many other rural regions due to the State Electricity Commission constructing the Kiewa Hydro Electricity power turbines (late 1930's to mid 1950's). Petrol and diesel generators were used in other rural regions before state wide electricity was available.The significance of this kerosene lamp to the Kiewa Valley is that it provides the proof that before the Hydro electricity scheme was established in the valley, householder and commerce relied on candle/kerosene power. Although at certain times before battery and solar energy became the night time lighters the sole source of lighting was candle power and kerosene power. The supply of both however was still required by most of the population by supply from city and larger country town suppliers. This nearly fully glass made table lamp(kerosene) has a large glass bowl/basin like kerosene storage unit with a glass circular finger handle (similar to a ordinary cup). Formed single star like patterns (50mm apart) encircle the centre of the bowl. On top of the bowl sits the metal (brass) wick holder with a small wheel protruding out one side for adjusting the wick length(increasing or decreasing the strength(regulating) of the amount of light projected. Four prongs rise from the circular base light fixture holding the windproof and refractive glass "pot belly" shield. lamp table, kerosene lamp, household lighting (non electrical)

Bogong Village, which was known as “The Junction”, is well recorded. The first tent camp was at the junction of Pretty Valley and Rocky Valley streams in the early 40’s. Further downstream were the sawmill, stables and blacksmith’s forge. Horses were the main mode of transport in the early days. The road to Bogong had reached the lookout spur just beyond Roper’s Spur track just before the 1939 fires. The early forties saw rapid growth of the village, with single and married men’s quarters, workshops, mess huts and administrative offices. The facilities necessary for communal living were quickly in place- a post office, police station, co-op store, medical centre, community hall/theatre, tennis courts and school. Much of the temporary accommodation that housed groups such as the Albion Quarrying Company were in the area now under water.Pictorial history of the early years of Bogong Village including one photo taken following the devastating fires of 1939. Photos show the terrain in which Bogong Village was built, the early construction used for the temporary buildings and the housing and the amount of infrastructure required to accommodate the needs of the residents of the area including workers, their families and other support staff. Set of 9 black and white photographs and photocopies of photographs depicting early buildings at Bogong Village . Photos show very early construction buildings as well as the village in various weather conditions, including snowing and after bush fires. (some official SECV photographs) 1. Bogong Village in heavy snow 2. Bogong Township during heavy snow (SECV Official Photo) 3. VIP Lodge at Bogong in the snow 4. Bogong Village - circa 1940’s 5. Bogong Village under street lights 6. Lewis Construction Camp (SECV Official Photo) 7. Albion Quarrying Co. Camp (SECV Official Photo) 8. Tent camp and early buildings following 1939 fires 9. Typical house – Bogong Village 1. Handwritten under photo – August 1948 2. Printed under photo: STATE ELECTRICITY COMMISSION OF VICTORIA Date: 25.8.48 Time: 9am No:K 4680 Kiewa Hydro-Electric Works. Bogong Township 3. Handwritten on back of photo- V.I.P. Lodge, Bogong 4 – 5. No markings 6. Printed under photo: STATE ELECTRICITY COMMISSION OF VICTORIA Date: 28.11.40 Time: 1.40pm No:K284 Kiewa Hydro-Electric Works. Lewis Construction Camp 7. Printed under photo: STATE ELECTRICITY COMMISSION OF VICTORIA Date: 11.1.41 Time: 10.40am No:K294 Kiewa Hydro-Electric Works. Albion Quarrying Co. Camp – Bogong. Handwritten on back of photo: On the floor of the present dam 8. No markings 9. Printed under photo: STATE ELECTRICITY COMMISSION OF VICTORIA Date: 11.1.46 Time: 1.23pm No:K2181 Kiewa Hydro-Electric Works. Bogong – Typical House bogong village; 1939 fires; kiewa hydro electric scheme;

MEYER COLLECTION - FALLS CREEK PHOTOS In 1947 a determined group of like-minded State Electricity Commission (SEC) staff including Ray Meyer, the chief surveyor of the Kiewa Hydro-Electric Scheme, had a common interest that revolved around the skiing potential of the snow-covered high plains which included what is now the resort of Falls Creek. The six SEC employees, Toni St Elmo, Ray Meyer, Jack Minogue, Lloyd Dunn, Adrian Ruffenacht and Dave Gibson (together with their families) banded together to secretly build a 'hut' that was the first ski lodge at Falls Creek. Using a road built in 1930s to gain access to Falls Creek, their hut project was carried out in secret as efforts by other skiers were blocked by H.H.C. Williams – the engineer in charge of the Hydro Scheme. In 1946 Ray Meyer made a trip to the Lands Office in Melbourne. He came away with a 99-year lease on three acres that was ideally suited for a hut designed by Lloyd Dunn. Adrian Ruffenacht (Design Engineer for the KHS) had suggested where the group should build because of easy access to a spring for water. Much of the building material required was scavenged from derelict huts on the high plains. Due to the need for secrecy, the determined group worked on the hut in the evenings and weekends to avoid detection. During the building period the group had met at Echidna Rock (now known as Eagle Rock) where Skippy St Elmo announced, "This is my favourite ‘Skyline’.” And so the first lodge in the area at Falls Creek Ski Resort came into existence. With the development of the International Poma in the 1970s, the Skyline Lodge, which was sited between the ski-lift’s pole one and pole two, was demolished. However, the legacy of Ray Meyer, Toni St Elmo, Jack Minogue, Lloyd Dunn, Adrian Ruffenacht and Dave Gibson and Skyline lives on in the vibrant atmosphere of Falls Creek Resort. The MEYER COLLECTION documents developments on the Kiewa Hydro Scheme and their life at Falls Creek from the mid 1930s to 1960s.This image is significant because Wallace's Hut is a heritage listed building which has provided shelter to cattlemen and skier on the High Plains since 1889.A black and white photo taken by John Meyer inside Wallace's Hut. The hut was built in 1889 and is probably the oldest surviving hut on the high plains of north-east Victoria. The State Electricity Commission used the hut from the late 1920s until the early 1940s to collect data on precipitation for possible future hydroelectric works. Toni and Skippy spent their first years on the mountain living in Wallace's Hut. falls creek, victorian snowfields, joan meyer, diamantina hut

Cambridge Instrument Co Ltd, England operated from 1924 to 1967. They were makers of measuring instruments (electrical) and scientific instruments.Timber framed electrical instrument with interior metal conductor. Brass knobs that screw are at one end labelled 1.5 volts and 15 amps. Plates each end labelledscientific instrument, cambridge instruments, electricity, scientific objects, scientific instruments

An induction coil consists of two coils of insulated copper wire wound around a common iron core. One coil, called the primary winding, is made from relatively few (tens or hundreds) turns of coarse wire. The other coil, the secondary winding, typically consists of many (thousands) turns of fine wire. An electric current is passed through the primary, creating a magnetic field. Because of the common core, most of the primary's magnetic field couples with the secondary winding. The primary behaves as an inductor, storing energy in the associated magnetic field. When the primary current is suddenly interrupted, the magnetic field rapidly collapses. This causes a high voltage pulse to be developed across the secondary terminals through electromagnetic induction. Because of the large number of turns in the secondary coil, the secondary voltage pulse is typically many thousands of volts. This voltage is often sufficient to cause an electric spark, to jump across an air gap separating the secondary's output terminals. For this reason, induction coils were called spark coils. The size of induction coils was usually specified by the length of spark it could produce; an '8 inch' (20 cm) induction coil was one that could produce an 8 inch arc. (http://en.wikipedia.org/wiki/Induction_coil)A metal and plastic object on a timber stand. In an induction coil the distance between the plates is often used to measure the voltage of the spark since the air breaks down at 30 000 volts per centimetreballarat college of advanced education, scientific instrument, induction coil, scientific instruments, electricity

Australian Porcelain Insulator Co. Ltd Factory, 1939 Four black and white photographs relating to the Australian Porcelain Insulator Co. Ltd Factory .1) exterior view .2) view of a 22kv line pin .3) mechanical test m/c pulsating load 0-35,000 .4) electrical test room 120kv - 20kva test transformer test capacity. 2 tables approximately 40 feet to 10 inches per table.australian porcelain insulator company, industrial heritage, insulators, electricity, graham beanland

Large register of enrolments at the Ballarat School of Mines. The register is missing its cover. ballarat school of mines, student enrolments, grenville college, university classes, electricity