AMNH LIBRARY 



SCIENCE-GOSSIP. 



100164823 



JOHN J. GRIFFIN & SONS, LTD.. 



Chemical, Philosophical, and Photographic Instrument Makers. 



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Physical and Ohemical Apparatus of Every Description. 



HOT AIR MOTORS. 



NO NOISE. 



NO SMELL.. 



Invaluable in a Laboratory or Workshop, 



As the full power can be obtained 

 in less than five minutes. 



Gas not Essential. Spirit Burner Sufficient. 



Various Sizes, from Vo to -g- Horse-power. 

 Full particulars on application. 



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''H" Edinburgh Student's FRAM ^^.^^ Microscope. 



Microscope- 



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Stand-ivith i Eyepiece ., £9 lOS. 



Ditto, completely fitted with 



2 Eyepieces, i in. and \ in. 



Objectives. Abbe Illr. and 



Case £15. 



No other Microscope combines 

 so many mechanical conveniences ^ Highest-class Microscope at a very 

 and workmanship of such perfect 

 character at so low a price. 



Provided with adjustment to render 

 them over or under-corrected, they 

 can therefore be used with either 



Apochromatic or Achromatic 



Objectives, 



Price . . . . I7S. 6ci. each. 



moderate cost. 



Set X. Stand with i Eyepiece, i in. and \ m. 

 Objectives, in Case, £6 I5s, 



Watson's Catalogue of Microscopes and Apparatus (No. 2) contains full particulars of their celebrated Instruments. 

 Watson's Catalogue of Microscopic Objects (No. 3j is a Classified List representing a stock of 50,000 first-class specimens. 



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