This object is part of a collection relating to the history and development of computing and other information technology assembled by Assoc Professor Allan Bromley of Sydney University, comprising of calculators, mechanical and electronic analogue computers, computer components, kit computers, education computers, and associated ephemera.

Allan Bromley was a lecturer and researcher at the University of Sydney Basser Department of Computer Science from 1978 until his untimely death in August 2002. He specialised in Computer Architecture, Computer Logic and in particular the History of Computing. He was regarded as the world authority on Charles Babbage's Calculating Engines (instigating the rebuilt of DE2 at the Science Museum London) and the Ankithera Mechanism and had extensive knowledge on calculators, analogue computers, logic, stereopsis, totalisators, clocks and time keeping and mechanical engineering.

W & G, Melbourne, Australia, c 1940

Commonwealth of Australia, Department of Civil Aviation

Circular slide rule with instruction booklet and pouch, Radio Transmission Line Calculator, plastic / paper / leather, made by W & G (White and Gillespie), Melbourne, Victoria, Australia, c. 1940

Slide rule, Radio Transmission Line Calculator, two plastic disks with cursor. Engraved with logarithmically spread polar graphs. With instruction book. Leather pouch in poor condition.

Made: 1935 - 1945

On pouch: Radio Transmissioin Line Calculator - DCA Ident No G65/2 (?)
made by >W & G< Melb. Aust - for - Commonwealth of Australia - Department of Civil Aviation.

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1935 - 1945