ADVERTISEMENTS. 



BROWN'S 

 OPTICAL & PHILOSOPHICAL 



INSTRUMENT DEPOT, 



76 ST. VINCENT STREET, GLASGOW. 



SURVEYING INSTRUMENTS, DRAWING INSTRUMENTS AND 



MATERIAL. 

 SPECTACLES AND EYE GLASSES in Gold, Silver, Steel, and Tortoise-shell 



Frames. 



MICROSCOPES by the best French and English Makers. 

 ANEROID BAROMETERS from Pocket size upwards, with and without 



Scale for Measuring Heights. 



OPERA AND FIELD GLASSES, Achromatic, in all the various qualities. 

 PEDOMETERS, RADIOMETERS, THERMOMETERS. 

 STEREOSCOPES, GRAPHOSCOPES, MAGIC LANTERNS. 

 PHOTOGRAPHS OF SCOTTISH, SWISS, ITALIAN, AND OTHER 



SCENERY. 

 N.B. State of Sight ascertained by Improved Optometer. 



