^os.^^ 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

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



No. 1678, Vol. 65] 



THURSDAY, DECEMBER 26, 1901. 



[Price Sixpence. 



Registered as a Newspaper at the General Post Office.) 



[All Rights are Reserved. 



NEWTON & CO.'S 



PATENT 



" DEMONSTRATOR'S " LANTERN, 



FOR LIMELIGHT OR ELECTRIC. 



With Prism for Erecting, 



and for Vertical Projection. 

 Pkice £10 10s. 



3 FLEET ST., 

 LONDON. 



The most simple 

 and efficient 



Single Lantern 



yet constructed 

 for general 



scientific work. 



THIS SEASONS 



CATy^LOCUE OF 



SLIDES, &C.. 



POST FREE. 



This Universal Lan 

 has been devised for the 

 projection of experiments 

 and slides either horizontally 

 or vertically ; it can easily 

 be adapted for use as a 

 Lantern Microscope. The 



made 

 o that the Lant. 

 packed into a box iSi X 8^ 



REYNOLDS & BRANSON, Ltd., 

 Estimated anp] L, ^3 E I> S. [Catalogues Free 



rr^rj-r-^ tvixtaa/ I negretti & zambras 



lirit-. JNiLW TRAVELLER'S SCIENTIFIC COMPANION. 



"LONDON" 



MICROSCOPE. 



With Eye-piece | inch, ^ inch 



Object - glasses, in Mahogany 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- e.xtra. 

 Focussing Substage, 14/6 extra. 



R. & J. BECK, Ltd., 



68 CORNHILL, 



Aneroid Barometer with Altitude Scale, Comp,iss with Luminous Dial for 



Night Marching, and Thermometer for Air Temperatures (or a Clinical 



Thermometer may he substituted). 



PRICE £4 10s. to £7 10s. 



Can also be ha.l Mounted in Gold and Silver Cases. 



" Special" Illustrated Price List of Instruments, suitable fcr 



Presents, free by Post. 



38 HOLBORN VIADUCT, E.G. 



BRANCHES-4:; CORNHILL; 122 REGENT STREET. 

 AWARDED TWO GOLD MEDALS PARIS EXHIBITION 1900. 



