ADVERTISEMENTS. 



ESTABLISHED XJBE*S ffil^iP\V A.D. 1765, 



GARDNER & CO., 



Clj^I^S TO HER HYI .A. J IE S T Y, 



SPECTACLE MANUFACTURERS, 



Mathematical and Philosophical Instrument Makers, 

 53 BUCHANAN STREET 



(NEARLY OPPOSITE ARGYLE ARCADE), 



J, GLASGOW, 



Make and. Sell 



EYE GLASSES Set in Steel, Tortoise-shell, and Gold Frames. 



SPECTACLES in Blued Steel and Gold Frames. 



SPECTACLES with Neutral Tinted Glasses or Sun Shades, and for 



Preserving the Eyes from Dust or Wind. 



OPERA GLASSES, KACE, FIELD, AND MARINE GLASSES. 

 TELESCOPES. 



MICROSCOPES AND MICROSCOPIC OBJECTS. 

 STEREOSCOPES AND SLIDES. 

 MAGIC LANTERNS AND SLIDES, comprising Views of nearly all 



parts of the World, 

 POCKET MAGNIFIERS. 

 HAND MAGNIFYING GLASSES. 

 BOTANICAL MAGNIFYING GLASSES. 

 BAROMETERS. 

 ANEROID BAROMETERS. 

 POCKET ANEROID BAROMETERS. 

 POCKET ANEROID BAROMETERS, with Scale for Measuring 



the Height of Mountains. 



DRAWING INSTRUMENTS. 

 OPTIC SQUARES. 

 CROSS STAFF HEADS. 

 THEODOLITES. 



SURVEYORS' LEVELS. 

 LEVELLING STAVES. 

 MINERS' COMPASSES. 

 MEASURING CHAINS. 



TAPE MEASURING LINES. 

 POCKET SPRING MEASURING LINES. 

 MAGNETO-ELECTRIC MACHINES. 

 GALVANIC BATTERIES, for Simultaneous Blasting. 



And all other Articles in the Line. 



