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R. & J. BECK, 



MANUFACTURING OPTICIANS. 



68, CGRNHILL, LONDON, E.G. 



1016, CHESTNUT ST., PHILADELPHIA, U.S.A. 



FACTORY: 



LISTER WORKS, HOLLOWAY, LONDON, N. 



MICROSCOPES, 



MICROSCOPE OBJECT-GLASSES, 

 PATHOLOGICAL AND 

 PHYSIOLOGICAL PREPARATIONS, 



AND ALL 



Materials and Instruments for Mounting 

 Objects, and for Students' Use, 



ILLUSTBATED GATALOaUES 



AND 



DESCmPTIYE PAMPHLETS 



Of the Cheaper Forms of Microscopes forwarded upon 

 Application to 



68, CORNHILL, LONDON, E.G. 



