OCTOBKK 12, I 905 J 



NA TURE 



DIFFRACTION GRATING AND SPECTROSCOPE. 





THIS INSTRUMENT OBTAINED A GOLD MEDAL AT THE ST. LOUIS EXHIBITION, 1904. 



We have supplied these instruments to many of the most renowned physicists in the world. In addition to many supplied 

 for use in the United Kingdom, they have been sent to the following countries — America, France, Germany, Russia, Japan, 



Holland, Sweden, Denmark and Italy. 



AI>1L1VI HILGER, Ltd., 75a Camden Road, London, N.W. 



reUtlfiiiihle Aihlvexs .— " .SpheiicUi/, LohiIoh." 



ILLUSTRATED LIST ("A") OF SPECTROSCOPES AND SPECTROSCOPIC ACCESSORIES GRATIS ON APPLICATION. 



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JOHN J. GRIFFIN & SONS, 



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 SCIENTIFIC INSTRUMENT MAKER 



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Qicatatwns sitl'milli;/ /or Laboratory Oulfils or Single Inslrumcnls 



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