A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 
“* To the solid ground 
O7 Nature trusts the mind which builts for aye.’’—WorDSwoRTH 
San EMBER to, 
No. 828, VOL. ae THURSDAY, 
1885 
[PRICE SIXPENCE 
Registered as a Newspaper at the General Post Office] 
[All Rights are Reserved 
CHATWOOD'S 
DUODECUPLE _«* 
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Have received highest Awards at all International Exhibitions, 
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AMATEUR PHOTOGRAPHY. 
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MARION’S Photographic Outfits. The Largestand Best 
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WMARION’S Academy Camera. 
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WIARION’S Practical Guide to Photography. Second Edi- 
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SHOW ROOM—GROUND FLOOR. [519 
OW cai ee 
HOW TO USE OUR EYES, AND 
HOW TO PRESERVE THEM FROM 
INFANCY TO OLD AGE. 
WITH SPECIAL INFORMATION asoutT SPECTACLES. 
THIRD EDITION. 
By JOHN BROWNING, 
F.R.A.S., F.R.M.S., &c. 
With 54 Ittustrations. Price 1s.; Cloth, rs. 6d. 
Extracts from Notices of the First Edition — 
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CHATTO & WINDUS, PICCADILLY, LONDON, W. 
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Sent free for 1s. 2d. by the Author, JoHN Browninc, 
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liiustrated Description Post Free 
NEGRETTI & ZAMBRA’S 
Large Illustrated Catalogue, 
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Silver Medal Wey ee iS entions Exhibition, 1885. 
