376 On a solar Calorimeter usea in Egypt 



Observations during the Eclipse. 



The calorimeter was directed to the sun as soon after 

 totality as possible. At 8 hr. 34 min. the sun was totally 

 eclipsed ; at 8.51 the calorimeter was directed to the sun but 



Minutes 



Area of Sun. from 

 Exposed Totality 

 O'OOO minute, 



VOOO 102'5 min. 

 Fig. 9. Diagram of exposed surface of the Sun at successive epochs after Totality. 



no boiling took place. At 8.58 the water began to "sing"; 

 at 9.1 it boiled ; at 9.3 it was boiling briskly, but it was not 

 till 9.17 that the first drop of distillate fell into the receiver. 



