[SHAW] 



RELATIVE HUMIDITY 

 Table II. 



127 



Sample observations which show the value of the "comfort factor ' in cases where "tem- 

 perature" and "humidity" are misleading. 



Table III. 



Sample observations which indicate the accuracy with which the absolute vapour pressure 

 may be obtained directly by means of a "moistened paper" hygrometer. 



(N.B. It should be noted that the probable errors for one column may be considered 

 equal respectively to those for the other). 



Macdonald College, 



McGill University. 

 May, 1917. 



