

A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



(t To the solid ground 

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



BALANCES & WEIGHTS 



SPECTROMETERS 



Particulars and Prices on application to— 



JOHN J. GRIFFIN & SONS, L™ 



Kemble Street, Kingsway, 

 London, W.C.2. 



REYNOLDS & BRANSON, Ltd. 



Chemical Glassware, Chemical and Physical Apparatus Makers 



to Mis Majesty's Government (Home and Overseas Dominions), 



Laboratory Outfitters, &c. 



Gold Medals at Allahabad and London. Grand Prix and Gold Medal 

 at the International Exhibition, Turin. 



STROUD 



& RENDELL SCIENCE LANTERN. 



The "University" Lan- 

 tern, with Russian iron 

 body, sliding baseboard, two 

 superior objectives, with rack 

 and pinion for foi u 

 densers 4 i in. diam., pla: 

 silvered mirror " A," which 

 moved by a knob causing the 

 rays to be reflected upward 

 for the projection of objects 

 in a horizontal plane silvered 

 prisi 



"C," 



which can be used 



np, slide carrier, complete in travelling ca; 

 adjustable stage for supporting apparatus. 



PRICE ON APPLICATION. 

 CATALOGUES (Post free). 



14 COMMERCIAL STREET, LEEDS. 



HOLIDAY 

 BINOCULARS 



We have over 40 different Prism 

 models, and many second-hand pat- 

 terns in stock. Ask for price list 

 "B.N.," or for a selection on approval. 



^EGRETTI © ZAMBRA 



38.HOLBORN VIADUCT. E.C.I. 

 LONDON. 



