\^ 



A WKEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid !^-oiitid 

 n/ Nature trusts the mimi which builds for <y„."-\\ORDSVVORTH. 



X-RAY FOCUS TUBES. 



The " l-ncus" Tubes manufactured by 



NEWTON & CO., 



3 FLEET STREET, LONDON, 



are still unrivalled for brilliancy and det^niiion, and are used by 

 nearly all the leading workers. 



Dr. I. MacintvRE, of Glasgow, in Nai'URE, September 10, 

 says that with these Tubes he has obtained "some of the best 

 photographic results in the deeper structures of the body." 



In consequence of the large number of these Tubes which have 

 now been sold, it has been possible to reduce the price to 25s. 

 each. With these Tubes and a 6- Coil and Fluorescent Screen, 

 the beating of the heart and the movements of the iliaphragm 

 can be readily .seen in an aduli. 



Fluorescent Screens, intensely brilliant, 

 8" X 5", 36s. ; lo" X 8", 63s. 



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 

 1 Eyes," &c. 



LIST OF COILS, TUBES, SCREENS, i re. POST FKEE. 



No Scientific Man 



should 



be without a 



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

 narts of the Eye ; the Chart is about lo inches by 8 inches, and 

 is bound with twenty pages of letterpress and six engravings 



in the text. _. , ^t t- t- 



PRICE 2S. 6d. NET. 



Sent, Post Free, for 2s. 6d. , I'y 



MR. JOHN BROWNING, 



OPHTHALMIC OPTICIAN, 

 NEGRETTI & ZAMBRA'S 



BINOCULARS AND TELESCOPES. 



^f,^.VV,Ve^5?HSR OF THE WATCH- TELESCOPE, 



FRENA 



CAMERA. 



Full particulars 



free 

 on application. 



£2 2s. 



£2 2s. 



R.&J.BECK.Ltd., 68 Cornhill, London, E.C. 



AS supplied by NEGRETT, ^J^,^;^"* ..V%^':»r''aTd°'^'";,H.y. 

 Length, when l"g--"^- ^\ Z A M 8 R A , 



Branches "45 CORNHILl; ,22 REGENT STREET. 



Illustkateu Pkilk Lists fKut 



