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459. IBBETSON, Capt. L. L. BOSCAWEN, Clifton House, Old Brompton — Inventor.
Electrotypes from the animal and vegetable kingdom. Ornamental castings in various metals; also castings, etc., in iron, and covered with metallic surfaces, by a new method.
Trigonometrical model of the Undercliff, Isle of Wight. The new feature in this model is, that an extent of country has been modelled from a trigonometrical survey, the vertical heights being on the same scale as the base, three feet to a mile. The model was carried to the spot and modelled, and the hypothenuse lines made to correspond with the base. Upwards of 20,000 heights were measured. It is painted so as to combine both geography and geology, the phenomena being carefully delineated.
A blowpipe giving an uninterrupted and regular flame for chemical analysis and other purposes.
An oxyhydrogen microscope, with new safety tubes and an adaptation of the blowpipe for chemical and other purposes, also an arrangement for collecting the gases separately.
Manufactured by C. W. Collins, Royal Polytechnic Institution, Regent Street.