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A WF.KKLY ILLUSTRATED JOURNAL UF SCIENCE. 



" To the solid ground 

 Of NoUure trusts the mind which builds for aye." — Wordsworth. 



INDUCTION COILS. 



esSPS. NEWTON & CO., of 3 Fi.i;et Street, London, 

 ive made an arrangement with Mr. .Al'i's by which the results 

 his unequalled experience in large Coil making have been 

 lly placed at their disposal. 



As he has been unable to cope with the demand for these 

 struments, Apps' Patented Coils are now manufactured con- 

 rrently liy Messrs. Newton & Co. on their own premises. 

 These Coils have for many years been acknowledged the best 

 id most efficient in the world, and it is hoped that the high 

 lality of workmanship maintained in Messrs. Newton & Co.'s 

 arkshops may .still further increase their reputation. 

 .\ll the Coils up to lo-inch are tested to considerably more 

 an the guaranteed length of spark. 



All the above Coils are covered in ebonite, and are of the 

 ghest quality, and all are fitted with Commutator and five pairs 

 Terminals so that they can be used with Primary Batteries or 

 ccumulators or direct from the main, and the Condenser can be 

 t out if desired, which should be done when using alternate 

 rrents. 



fhetaaCaSa 



♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦ 



j<»e»PAi>Hi up-jo-jiTt 



PARTICULARS of this 



unique HAND-CAMERA 



may Ije liad FREE on 



application to 



R. & J. BECK, 



■.i<i., 



68 CORNMILL, 

 LONDON, E.G. 



THE EYE 



Anatomically represented in a Coloured Sectional Chart, with 

 explanatory text. 



By DR. RENLOW. 



Revised and Edited, with an Introduction on Eyesight, by 

 JOHN BROWNING, F.R.A.S., F.R.M.S., 



President of the British Optical Association, Author of " Our 

 Eyes," &c. 



This Chart shows, in twenty sectional parts, all the principa 

 pans of the Eye ; the Chart is about ID inches by S inches, and 

 is bound with twenty pages of letterpress and six engravings 

 in the text. 



PRICE 2s. bd. NET. 



Scut, Post Free, for zs. dd. , ly 



MR. JOHN BROWNING, 



OPHTHALMIC OPTICIAN, 

 63 STRAND, LONDON, W.C. 



STTJVtIVt ER, I^OIL .IP.A.'ys. 



NEGRETTI & ZAMBRA'S 



BINOCULARS AND TELESCOPES. 



Makers of the "OFFICER OF THE WATCH" TELESCOPE, 

 els of H.M. Navy. 



£2 2s. 



£2 2s. 



As supplied by NEGRETTI & ZAMBRA to the War Office. 



Length, when closed, ii inches. Conibinin;,; high power and portability, 



NEGRETTI & ZAMBRA, 



SCIENTIFIC INSTRUMENT MAKERS to the QUEEN, 

 38 HOLBORN VIADUCT, E.C. 



Branches: 45 CORNHILL; 122 REGENT STREET. 



