TABLE 27. Data obtained by weighing method. 



Average loss per hr. .13 g. Loss in volume = 10.93 cm. 3 



Surface area 150 cm. 2 Volume 125 cm. 3 



On March 3rd at 12 o'clock the temperature became o C. 

 and as the ice began to melt no further readings were taken. 



The dimensions of the cubical piece of ice used decreased in 

 the 74 hours from 5 cm. to 4.85 cm. or the volume from 125 cm. 8 

 to 114.07 cm. 3 , while the weight decreased from 115.36 g. to 

 103.807 g. or a loss of 11.353 g- in 74 hours making an average 

 hourly decrease by evaporation of 0.153 g. approximately. 



From these data it may be seen that the amount of evapora- 

 tion increases as the temperature increases when the pressure 

 remains constant, and as the experiment was performed indoors 

 there was no wind or air currents. The glass sliding door of 



45 



