HARD WICKE'S SCIENCE-GOSSIP. 



xns 



tub Lantern anil tne microscope, 



Lantern, with 43-in. Compound Condenser and one 

 Compound Achromatic Objective of either 4, 6, 8, 

 10, or 12 inches back foci. (For full description see- 

 Lantern Catalogue) <£9 



Extra Objectives, of various foci, each ... 1 10 



Patent Triple Condenser, collecting 30 to 40 per 



cent, more light than the best double condensers. 

 Interchangeable lenses can be supplied for lengthen- 

 ing or shortening the focus to suit the objective in use. 

 The lens nearest the light being protected by a cover 

 glass is not liable to fracture by heat. Extra 15 

 ' Eclipse ' Carrier. (See Lantern Catalogue) 5 



Patent Lantern Microscope, of highest optical 



finish, with rack and pinion movements to both sub- 

 stage and objective-holder, and also fine screw 

 focussing adjustment, all the necessary fittings 

 for entirely rotating the polarising and analysing 

 prisms of polariscope, compound wheel of dia- 

 phragms, concave sub-stage field lens, two sub-stage 

 condensers, Barlow-lens amplifier, three objective 

 adapters, etc., all fitted in polished Mahogany 

 Cabinet, with water trough £9 



New Lantern Microscope Pamphlet Catalogue with 

 Instructions, post free, 3 Stamps. 



W. I. CU ADIVICK, 



2, ST. MARY STREET, MANCHESTER. 



BROWNING'S BJNOCJJLARS. 



THE 



ECONOMICAL" FIELD-GLASS. 



This Binocular has Achromatic Object-Glasses inch in 

 diameter, and Sliding Shades to shelter the Object-Glasses 

 from sun or rain, and is fitted in a solid leather sling case. 

 ^ Price £1 5 j. sent free. 



gPgggp p* Illustrated Catalogue of Binoculars post free. 



JOHN BROWNING, 63, STRAND, LONDON, W.C. 

 BOOKS BY DR. ANDREW WILSON, F.R.S.E. 



CHAPTERS ON EVOLUTION. With 259 Illustrations. Crown 8vo., cloth extra, ys. 6cL 

 LEAVES FROM A NATURALIST'S NOTE-BOOK. Post 8vo., cloth limp. 2 s. 6d. 

 LEISURE-TIME STUDIES. With Illustrations. Crown 8vo., cloth extra. 6s. 

 STUDIES in LIFE and SENSE. With numerous Illustrations. Crown 8vo., cloth extra, 6s. 

 COMMON ACCIDENTS: How to Treat Them. With Illustrations. Crown 8vo. is. 



cloth, is. 6d. 



GLIMPSES of LIFE and NATURE. With 35 Illustrations. Crown 8vo., cloth extra, $s. 6d, 

 I London : CHATTO & WINDTJS, 214, PICCADILLY, W. 



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