A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

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



REYNOLDS & BRANSON, Ltd. 



GOLD MEDAL, ALLAHABAD. GRAND PRIX. TURIN. 



" RYSTOS " OPTICAL BENCH 



ce Lantern. 



John J. Griffin & Sons, L 



KINGSWAY, LONDON, W.C. 



Scientific Instrument makers. 



^ 



^Ik > w _ (C. V. Boys's Patent.) ^fc- A 



For Studying Liquid Films, 



Marvellous 

 Colour- 

 combinations 

 of Infinite 

 Variety. 



'<6 



Unique 



Effects 



of 



Wonderful 



Beauty, 



"Pr»in*> ^i^/m Peking and Carriage 



r-riCe -^*»/ " in United Kingdom, 1/- 



Including 2 Bottles of special Soap Solution and Full Instr 



Negretti & Zambra 

 make the "Campbell- 

 Stokes" Sunshine 

 Recorder (adopted as 

 the " standard ") in 

 3 models : — 

 (1) the " LIniversal" — 

 illustrated ; 



(2) adjustable for 

 any 20° of 

 latitude ; 



(3) for one fixed 

 latitude. 



NEGRETTI 8- ZAMBRA 



Scientific Instrument Makers, 



Holborn Viaduct, London, E.C. 

 City Branch : 45 Cornhill, E.C. 

 West End: 122 Regent St., W. 



Write for 



list of . . 

 Sunshine 

 Recorders 

 —sent free. 



