THE 



AMERICAN JOURNAL OF SCIENCE 



[FOURTH SERIES. ] 



Aet. XXXI Y. — On some Experiments with Endothermic 

 Gases ; by W. G. Mixter. 



[Contributions from the Sheffield Laboratory of Tale University.] 



These experiments were made in U-tubes of 30 to 50 cm in 

 length and for high pressures the form shown in fig. 1 was 



1. 2. 



^U^ 



employed. The part above the electrodes a a was narrowed 

 for convenience in opening the tube and measuring small 

 residual quantities of gases. The other end was connected by 

 means of a small copper tube with a hydraulic pump. At o 



Am. Jour. Sci. — Fourth Series, Vol. VII, No. 41.— Mat, 1899. 

 22 



