Horace Darwin, youngest surviving son of Charles Darwin, was a founding partner of the Cambridge Scientific Instrument Company in 1881 (http://www.museumoftechnology.com/cic.html).Composite object with three feet supporting two squared cylinders attached to a clamping device and metal block with four current terminals. Cylinders are covered with red leather. Metal block and clamp base appear painted.Engraved on terminal block: 'No 15548 / THE CAMBRIDGE SCIENTIFIC INSTRUMENT CO LTD. CAMBRIDGE. ENGLAND' Engraved on side of terminal block: 'To be excited from 200 volts circuit / with coils in series. Connect terminals 2 & 3.'cambridge scientific instrument company, electro magnet, electrical equipment, electrical instrumentation

Used to communicate with the local telephone exchange and for connection to other subscribers. The introduction of automatic exchanges saw the their demise. This phone was used in the family home of the donor at Caboolture (aboriginal for carpet snake) during the 1940s and 1950s.A magneto telephone for communication with a manual telephone exchange. The handle on the right hand side, which was turned to rotate the magneto to call the exchange - ask operator for a number and then to be connected. Telephone enclosed in a specially designed box for mounting on the wall. There was a bell on top which rang when the magneto ringer at the exchange was turned. Fitted with a carbon microphone mounted on the front of the box for the transmission of the spoken word and an electro- magnet. A receiver which hangs on the left hand side on a hook. The hook acts as the on and off switch to answer the call and to switch on the battery to provide power for the receiver and energize the transmitter. There is an angled ledge for writing any messages. There is no battery. The circuit for the phone is on the inside of the door to the interior of the phone. pHone is type CDA116 - PMG Registered - Ericsson.communication, telephonic

Part of the Kenneth William Hesse, RAAF No. 41144 collection. See Cat No. 10364 for details of his service.Cream coloured pages extracted from a larger book. Text on pages in black type. Black and white photographs and black line diagrams on various pages. Pages secured on top LH corner with metal clips. Six holes punched along LH edge of pages.Some sections on various pages have a red line ruled through them.kenneth hesse, raaf, manual, electro magnets, training notes

2285.1 - 12 page technical pamphlet (2 sheets of paper - pages 5 -10 formed as a concertina folded centre sheet) titled "Interlocked electo-pneumatic brake", published by Westinghouse Brake Company of Australasia Limited, December 1926. Manual D.P. 9. Stapled with two steel staples along fold. Describes in detail the electro-pneumatic brake system as used on Sydney Suburban trains, complete with diagrams, brake valve operation, magnet valve and isolating cock switch. 2285.2 - Six page technical pamphlet, titled "The Westinghouse Brake with electro-pneumatic control", published by Westinghouse Brake and Saxby Signal Co. 1915. Pages 3 and 4 have been tipped in the cover sheet. Describes standard brake equipment for use with electric trains and electro pneumatic control over the brakes. Gives details of house the brake valve (No. 18 EP) operates. Scanned to the COTMA Website 4-10-2015."Colin Rutledge" stamped on top of page 1.trams, tramways, westinghouse, electric trains, electro - pneumatic brakes, sydney suburban trains