52 ILLINOIS STATE ACADEMY OF SCIENCE 



The United States Bureau of Mines published methods 

 for the quantitative determination of carbon monoxide 

 in blood as well as in air. 



ETHYLCHLOEIDE 



Anaesthesia by means of ethylchloride has had addi- 

 tional trial during the year. The use of calcium and 

 parathyroid preparations in various spasmodic disord- 

 ers has made some headway. 



The year has witnessed progress in the study of sun- 

 light and other forms of light and their application in 

 the treatment of rickets and other diseases. 



