A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

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



No. 2251, Vol. 90] 



THURSDAY, DECEMBER. 19, 1912 



[Price Sixpence 



, Newspaper at the Ge 



[All Rights Reserved. 



REYNOLDS & BRANSON, Ltd. 



"RYSTOS" OPEN STAGE LANTERN. 



GRAND PRIX. 



BUY DIRECT FROM 



, E.BECKER &C0 "^TTON WALL. 



iide do 



John J. Griffin & Sons, L° 



KINGSWAY, LONDON, W.C. 



Scientific Tnstruttient makers. 



'^X^ .C. V Hov.s Paten. , ^/^ 



■^I > For Studying Liquid Films. ^^ .^\ 



A 



Unique 



Xmas 



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Gorgeous 



and 



Fascinating 



Colour=effects. 



Pr»l/»<» ^> ^ _ Packing and Carriage 



XrriCe .<:2 3 - ;„ united Kingdom. 1/- 



Including 2 Bottles of special Soap Solution and Full Instructions. 



With Iron Body (suitable for any iUu 



brass sight holes, walnut base, meniscus condenser 4^ in. 

 diameter, objective of superior quality 2^ in. diameter, 6, 8, 

 9, or 12 in. focus, with rack and pinion. Complete in 



travelling case, but without burner £5 12 6 



"Pbcenix" Arc Lamp for above extra 2 2 



For Optical Lanterns of other designs, see Catalogue, 

 224 pages, post free. 



X4 Coxini¥xe]7ci£tl Sti7eet, I^eeds. 



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