so S, '/ z. 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

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



NEWTON'S PATENT 



Scientist's Biunial Lantern, 



Oxford and London Universily 

 Extension Lecturers, &c. 



Highest quality only, £\i, \\s. 

 New Catalogue of Optical Lanterns, 

 Projection Apparatus, and Scienlif'c 



and other Glides, I-oiir Sianipi. 



NEWTON & CO., 



Optictans to tht King and 



id slides either horizontally 

 ically; it can easily 

 be adapted for use as a 

 Lantern Microscope. The 



Base-board is made to fold 



so that the Lantern 



packed into a box i8i X 8J 



X 20i. 



Pkice Complete £9 



No Science School is com- 

 plete without one. Will he 

 sent on approval if desired. 



REYNOLDS & BRANSON, Ltd., 



ES AND) IL, E E X> S . [Catalogues Free. 



TME NEW 



"LONDON 



MICROSCOPE. 



SPECTACLES 



J 5 ELECTRIC LICHT, INCANDESCENT GAS. 



And other Powerful lUuminants. 



With Eye -piece | inch, \ inch 



Object - glasses, in Mahogany 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- extra. 

 5(K Focussing Substage, 14/6 extra. 



R. & J. BECK, Ltd., 



_^J^ 68 CORNHILL, 



NEGRETTI & ZAMBRA'S 

 THERMOSCOPIC LENSES 



Protect the Eyes from Glare, and 



RENDER THE LIGHT SOFT AND COOL. 



N. and Z.'s SPORTING SPECTACLES, close-fitting and having extra 

 laree lenses, are the best for Billiards, Riding, &c. „, , , 



Illustrated Price Lists Free by Post to all parts oj tlie World. 

 Motorists' and other Eve Protectors and Face Screens. 



N E G R ETTl AND ZA M B R A, 

 38 HOLBORN VIADUCT, E.G. 



BRANCHES: 46 CORNHILL; 122 REGENT STREET. 

 TWO GOLD MEDALS PARIS EXHIBITION 1900. 



