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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE.JAN 8 1914 
“To the solid ground \ 
Of Nature trusts the mind which builds for aye.’’—WorRpDswortH. 4, ' 
No. 2303, VOL. 92] | THURSDAY, DECEMBER 18, 1913 
[Price © 
{All Rights Reserved. 
REYNOLDS & BRANSON, Ltd. 
(GRAND PRIX, TURIN, 1911.) 
THE “RYSTOS” EDUCATIONAL LANTERN. 
With Iron Body (suitable for any illuminant), with side door and brass sight 
holes, walnut base, meniscus condenser 4} in. diameter, objective of 
superior quality 2{ in. diameter, 6, 7, 8, 9, 10 or 12 in. focus, with rack and 
th, pinion. Complete in travelling case, but without burner ... £5 12 6 
_ BUY DIRECT FROM Erecting Prism ‘‘C” in metal mount... 3 . extra 1 6 0 
‘* Phoemx’ Arc Lamp for above ... in abi be As Bes 0 
F E BECKER &CO HATTON WALL, Lantern fitted with 44” condenser .. ae Ay ¥5 24 010 6 
‘e = pie sega aay LONDON E c For Optical Lanterns of other designs, see catalogue, 
WAS. = 8 ; ,o.u. 
10th edition, 40 pages, .post free. 
14 Commercial Street, Leeds. 
JOHN J. GRIFFIN & Sons, L° 
Kemble St., KINGSWAY, LONDON, W.C. Write 
THE NB ©) W for Price 
\ (C. V. Boys's Patent.) eC ml dey 
2 ~ For Studying Liquid Films. op , List of 
“Gifts.” 
————__ 
Marvellous Unique ‘ — 
Colour- Effects Many of our Scientific Instruments 
combinations of are useful, handsome, and acceptable 
of Infinite Wonderful GIFTS. 
Variety. Beauty. 
Recording Barometers from £4 4s. to £27 10s. 
Packing and Carriage NEGRETTI & ZAMBRA, 
Price 2S/~  rvnia kingion te 38 Holborn Viaduct, London, E.C. 
Including 2 Bottles of special Soap Solution and Full Instructions. City Branch :- 45 Cornhill, E.C. 
A NEW CHEAP FORM. West End: 122 Regent St., W. 
Price 2/G Postage 4d. Extra Bottles of Solution, 6d. 
