. Science-gossip . l-iiiishcd in Iolislicd MahoLjimy. fti/c Weight 16 oz PRICE £4 4s. Positive and Negative Films, perforated (length 25 ft.;,X u. \\\-ii;lii 2\ His. price 3s. fed. each. Biokam Film Subiects ilenRlh 25 ft.) price lOs. Sale by all Opticians ar\d Photograptilo Dealers. Send for Handsome Illustrated Catalogue. THE WARWICK TRADING COMPANY, LIMITED, 4 & 5. AA/arwick Court, Hicrh Holborn. London, Special Series of Students* Cekscopes, Knini 4A in. lo 2{ in. apertures, wiih qualiiy ObjeGlas-ses and l-itlings, at moderuie prices.

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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience