The navigational computer was a circular slide rule used for calculating height and air speed corrections when flying an aircraft. The front cover lifts to reveal a further calculator used to solve vector triangles and plot course alterations. The device was intended to be strapped to a pilot's leg. The instrument was made by White and Gillespie (Melbourne) Pty Ltd c 1940 for the RAAF and used during WW2.Black metal box with silver metal flap top cover affixed with rotating circular rule . Two adjustable belts are affixed to the base of black box. A small spiral bound note book is contained beneath the flap top. RAAF Computer Navigational system MK. III. D. Serial No WG 2833navigation, raaf, computer, aircraft, ww2, 1940

A Bioscope show was a fairground attraction consisting of a travelling cinema. The heyday of the Bioscope was from the late 1890s until World War I. Bioscope shows were fronted by the largest fairground organs, and these formed the entire public face of the show . A stage was usually in front of the organ, and dancing girls would entertain the crowds between film shows. Films shown in the Bioscope were primitive, and the earliest of these were made by the showmen themselves. Later, films were commercially produced. Bioscope shows were integrated, in Britain at least, into the Variety shows in the huge Music Halls which were built at the end of the nineteenth century. After the Music Hall Strike of 1907 in London, bioscope operators set up a trade union to represent them. There were about seventy operators in London at this point. (http://en.wikipedia.org/wiki/Bioscope_show) The Projector was a rather unreliable piece of apparatus, powered by a variety of light sources, including Calcium Oxide (Lime-Light). A Calcium Carbide Burner, or the rather more superior Carbon Arc. All these methods were highly unpredictable & quite frankly...dangerous! Often resulting in explosions, burning down the entire Show! (which is probably why NO original Shows still exist. Alfred Ball's Bioscope, pictured below, built in 1905 was struck by lightning, shortly after the picture was taken! (http://www.circus-entertainer.co.uk/heritage.htm) In 1909 the first bioscopes pictures were shown at the Ballaarat Mechanics' Institute.Brass and green painted metal film projectorbioscope, vector, entertainment, projector, film, theatre, movie

Black leather covered album containing forty two drawings and paintings belonging to the Harris Family of Axedale. Written on the front cover of the album in gold paint is the name George Harris. The album has been used as a folio to hold the artworks. The artworks vary in size and those with dates range from 1886 - 1942. Nineteen are signed or initialled by George Harris and six by D Harris. One is signed by W W May. The others are unsigned. There is a range of mediums - pencil, water colour, chalk, charcoal, paint. They are mostly country landscapes, many including structures such as fences and bridges, some with farm animals, some with water. The D Harris collection includes a cat and a goblet. Study of a French Fishing Boat. Watercolour by Captain Walter William May. https://www.istockphoto.com/vector/study-of-a-french-fishing-boat-19th-century-gm1143359556-307028737 G Harris and D Harris signatures on some. W W May signature on one.harris family, axedale

Photos .1P, .2P, and.4P were most likely taken in the 1980s and photos .3P, .5P to .7P in the c1990s at the Army Survey Regiment, Fortuna, Bendigo. Despite lacking annotation on exact dates, locations and personnel, they are positively identified. CPL Ian Nelson in photo .1P is operating a Wild Pug 4 point transfer device in Air Survey Squadron c1980s. Control points were transferred onto the mapping diapositives of aerial photography by drilling their locations into the photographic emulsion. SPR Viv (Hawkins) Doherty in photo .2P, SPR Jeanette Drury-Lane in photo .5P and SGT Sandy Craig are operating a Wild B8 Stereoplotter coupled to a digital workstation in Air Survey Squadron c1994. Topographic features were extracted with the B8 in 3D and feature coded with attributes, using keyboard, menu, keypad and voice inputs to the computer. The features were stored in the AUTOMAP 2 digital database for subsequent cartographic production and printing. CPL Mick Ellis in photo .3P is operating the Optronix 4040 Scanner/Film Writer in Lithographic Squadron c1990s. In scanning mode, compilation sheets were mounted on the drum and scanned. The resultant raster file was vectorized, feature coded with attributes and stored by cartographic technicians in the AUTOMAP 2 database. In film writing mode, digital cartographic files were output at very high resolution for each print colour on photosensitive film, for subsequent finalisation, platemaking and printing.This is a set of seven photographs of technicians operating map production equipment at the Army Survey Regiment, Bendigo. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) - Photo, colour, c1980s. CPL Ian Nelson operating a Wild Pug 4 point transfer device in Air Survey Squadron. .2) - Photo, colour, c1980s. Wild B8 Aviograph stereoplotter feature extraction, SPR Viv (Hawkins) Doherty in Air Survey Squadron. .3) - Photo, colour, c1990s. CPL Mick Ellis operating the Optronics 4040 Scanner in Lithographic Squadron. .4) - Photo, colour, c1984. AUTOMAP 2 Graphic Edit Workstation, SPR Craig Kellet in Cartographic Squadron. .5) - Photo, colour, c1994. Wild B8 Aviograph stereoplotter feature extraction, SPR Jeanette Drury-Lane in Air Survey Squadron. .6) - Photo, colour, c1994. AUTOMAP 2 Graphic Edit Workstation, L to R: unidentified, SPR Rachel (Stanford) Scott, CPL Chris Wynn in Cartographic Squadron. .7) - Photo, colour, c1994. Wild B8 Aviograph stereoplotter AUTOMAP 2 Graphic Edit Workstation, L to R: unidentified (x2), SGT Sandy Craig in Air Survey Squadron..1P – no annotations .2P – annotated “Stereoplotter Workstation. The operator has the use of keyboard, menu, keypad and voice for input to the computer. Feedback is given through voice and screen messages.” .3 to .7P – no annotationsroyal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, air survey, litho, aerotrig, automap 2