KIPHER 4"^ ANN. REP. MAGNETIC SURVEY OF MISSOURI. 463 



Mean 67.5 



At 10:15 the ice-water was gradually removed, and hydrant 

 water was substituted, which was gradually warmed. The follow- 

 ing readings were then taken : 



Mean 104.3 



At i: 18 P.M. the doors of the water-bath were opened, and Cg 

 was allowed to cool down slowly, the water being finally replaced 

 by ice-water as before. The readings were then 



Mean 66.8 



