lxxxiv 



HARDWICKE'S SCIENCE-GOSSIP. 



K Tir I nrVPTA 2 ( ^ ol( * Medals, Paris Universal Exhibition, 1889. 



AWAflDliD 2 DiP E n rfb't' f Ho ° 8 °g 1 for A M ^ orosoopes and Microscopic Objects, Antwerp International Microscopical 

 — — — — 24 Gold and other Medals at the principal International Exhibitions of the world. 



MICROSCOPES. 



The Van Heurek Mieroseope. 



(REGISTERED.) 



Designed specially by WATSON & SONS, to the 

 specification of Dr. Van Heurek, of Antwerp, for his 

 delicate high-power work and Photography. 

 THE 



Edinburgh Student's Microscope. 



Made in four forms, suitable for the Amateur, Student, 

 ; or Professor. Pri:e from £3 10b. 



The Scientist's Mieroseope. 



A largest size Microscope with all latest improvements 

 and every convenience for work. 



MICROSCOPIC OBJECTS. 



Section through sori of Fern . . .1 

 Set of 24 Iiotanical Slides (comparative 

 anatomy) specially arranged for the use of 

 S intents. (See page 29 of New Catalogue) 32 

 Oak Moth. Opaque. Very pretty . . 1 

 Desmid — Micrasttrias . . 1 



Drosera — New slide, with insects captured 1 

 New Slide, with about 150 selected Diatoms 

 from Oaniaru, N.Z. (Exceptionally fine) . 6 



Set of 24 choice selected Diatomacece (see 

 page 16 of New Catalogue) . . .35 



New Slides eojitaining different Species of 



One Genus of Dialomaceez. 

 Pleurosiguia, 50 Species . . . .15 

 Surirella, 100 „ .... 16 

 Co=cinodiscus, .... 7 



Navicula, ,, . . . .7 



Full Illustrated Catalogue of Microscopes and Apparatus. 

 JUST PUBLISHED. — NEW CLASSIFIED LIST OF MICROSCOPIC OBJECTS. 



Either of the above Catalogues sent post free on application to 



W. WATSON & SONS, Opticians to Her Majesty's Government, 



313, HIGH HOLBORN, LONDON, W.C., 

 [Established 1837.1 AND 251, SWANSTON STREET, MELBOURNE, AUSTRALIA. 



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LANTERNS 



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A best quality Single Lantern with Superior 

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The entire front reverses for portability. 



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