Animated = 

 Photography 



A combined Cinematograph and Snap- 

 shot Camera, Printer, Projector, 

 Reverser and Enlarger, fitted with two 

 SPECIAL VOIGTLANDER LENSES. 



lln. hi \ Finished in Polished Ehony. 



PRICK £0 6s 



St IENCE-GOSSIP. 



Amateurs. 



' PATENTED. 



THE BIOKAM PROJECTOR, 



For Projecting, Reversing and Enlarging, fitted with 

 One VOICTLAfVDER Wide A,ngle LENS 

 and adapted to screw into Len,s Flange 

 of A.NY EXISTINC..LANTERN. 



.1 ni 1'olishud i i . \\ \, ,, oz > 



PRICE £4 4s- 



Positive and Negative Films, perforated (length 25 It. , 

 ! X i 1 . X 'i. 1 .. Weight 2ilbs. _ price 3s. bd. each. 



Biokam Film Subiects (length 25 ft.) price 10s. each. 

 For Sale by all Opticians an,d Photographic Dealers. Send for Handsome Illustrated Catalogue. 



THE WARWICK TRADING COMPANY, LIMITED, 



4 & 5, Warwick Court, High Holborn, London, W.C. 



TANGENT GALVANOMETER, £1 10s. 



AN 



T. TAMBLYN-WATTS, 



Scientific Apparatus leaker, 



Goldielands, 



Settle, Yorks. 



Catalogue of Electrical Apparatus and Materials, 

 fad. post free. 



Catalogue of Balances and Weights, Apparatus for 

 the study of Mechanics, etc., fad. post free. 



MEMORY 



DRAIN- 

 ING. 

 Pel- 

 man's 



System 



SCIENTIFIC DEVELOPMENT OF THE NATURAL MEMORY. 

 Mind-Wandering Cured Success al Exams. 



£*" A ouick, stire and easy method of learning .ill Branches of 



Science. Mathematics. Languages, >v. 

 Lessons in " the System" conduct .German, 



Itidiai: a 



"loan confidently recommend the system in everj instance 

 where much mcmor\ work is necessary." 



' G. W. Connor, M.R.C.S., I.. U.S. (Lond. . 

 " Pelman's system exceptionally effective.' -Ed. Science* 

 CORRESPONDENCE LESSONS tMi PERSONAL TUITION. 



SCHOOL OF MEMORY TRAININC, 70w, BERNERS ST,, LONDON, W. 



Special Series of 



Students' telescopes, 



From 4' in. to z\ in. apertures, with firsl quality Object 

 Glasses and Fittings, al moderate prices. 



List o 

 Pbotogra 

 Lenses 

 Free. 



High-Class 



Photographic 

 Lenses, 



with Iris 

 or 

 other 

 aphragms. 



I II uMralcd Catalogue m Telescopes. Microscopes,. tic, Ac, forslamp 



Highest Class Micro-Objectives, also made 

 on premises, at Closest Prices. 



W. WRAY, nort „Vh'cat E , London, N. 



