SCIENCE— ADVERTISEMENTS 



A NEW ANALYTICAL BALANCE 



TROEMNER No. 50 - - $50.00 net 



Made by HENRY TROEMNER, Philadelphia, for the ARTHUR H. THOMAS CO. 

 Guaranteed by Maker and Seller 



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After long cooperation with the firm of Henry Troemner, Philadelphia, we are enabled to offer a 

 Balance at $50.00, bearing his name and guarantee, but made specially for us, which will satisfac- 

 torily meet all the practical requirements of the analytical laboratory as well as any Balance listed 

 at $125.00. 



This Balance has a definite sensibility of 1/lOth milligram under full load of 200 grams in 

 each pan and is of the finest finish throughout. Pan and hanger extra wide. Bearings of agate through- 

 out. .New triple point beam arrest of " fall away " type. Because of its rigid and robust construction 

 it is particularly adapted to the daily wear and tear of students' quantitative work and offers the ad- 

 vantage of practice with the type of Balance now in wide use in Industrial Laboratories. 



Send for descriptive pamplet 



ARTHUR H. THOMAS COMPANY 



IMPORTERS AND DEALERS 



MICROSCOPES, LABORATORY APPARATUS AND CHEMICALS 



West Washington Square, PHILADELPHIA 



