SEVENTH ANNUAL RECEPTION. 497 



German Reichsanstalt proving purity for special chem- 

 ical and physical work. 



11. New Chemical Charts. Exhibited by Messrs. Eimer and 



Amend. 



a. Official table of American Chemical Society, the ele- 



ments with their atomic weights. 



b. Chart of the periodic arrangement of the elements ac- 



cording to Professor Mendeljeff, corrected up to date, 

 by' Professor F. W. Clark. 



12. Collection of New Chemical Apparatus. Exhibited by 



Messrs. Eimer and Amend. 



a. Agate mill designed by Professor Maerker, especially 



constructed for Laboratories of Agriculture Stations ; 

 of use in reducing coarsely powdered fodder to fine 

 state, and also useful for general laboratory work. 



b. Gas pressure regulator, according to Professor Murrill ; 



very convenient and simple form of laboratory pres- 

 sure regulator, connected with a thermostat ; temper- 

 ature may be held constant within o. i ° C. 



c. Analytical balance. New construction, with circular 



beam, reducing vibrations and increasing stability and 

 rapidity of action. 



d. New automatic cupel machine making 600 perfect 



cupels an hour. 



e. Zeiss binocular microscope according to Greenough, 



made by Carl Zeiss (Eimer and Amend, Agents) for 

 examining crystalline chemicals, minerals, etc. 



E 



ELECTRICITY. 



In Charge of Geo. F. Sever. 

 I. Reactance Conductor for investigating Cable Telephony. 



Exhibited by M. I. Pupin. 



