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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 
/ “* To the solid ground 
< Of Nature trusts the mind which builds for aye.” —WORDSWORTH, _ ie : 
3 No. 2776, VOL. 111] SATURDAY, JANUARY 13, 1923 [PRICE ONE SHILLING 
: "Registered as a Newspaper at the General Post Office.) : al —— i ali o_o TARO NRA eetics 
; REYNOLDS & BRANSON, Ltd. 
F Complete Laboratory Furnishers and Manufacturers of Chemicals, 
Chemical, Physical, Optical, and Photographic Apparatus. 
NEWTON’S 
SCIENCE AND OPAQUE 
LANTERNS 
SEE FIRST OPENING 

(PAGE XI.)  BYSTOS” MICROSCOPE LAMP can be supplied fitted for either electric 
globe or incandescent gas mantle (if former, state voltage). PRICE COMPLETE 
with 2)” plano-convex condensing lens with 6 feet of flexible cord and 
bayonet plug. The lamp can be raised, lowered, or tilted to any required 
angle: £1: 7:6. 
Can be easily adapted as a Lecturer’s Reading Lamp. 
14 COMMERCIAL STREET, LEEDS. 
mga ea WIRELESS 
Physical A P PA R AT U 2 
Apparatus Complete sets in stock 


for 
Schools 

also components 
aaah Call or write 
Colleges. EGRETTI @ ZAMBRA 
- 38, HOLBORN VIADUCT.E.C.1. 
ai. +15 CROSS STREET HATTON GARDEN LONDONECI LONDON. 
RESISTANCE BOX 
1 = 

