46 



PROCEEDINGS OP THE AMERICAN ACADEMY 



* In this set of observations a substitute took the place of the usual observer 

 at tlie galvanometer. 



t The thermopile leaked badly past the nickel core during this set of obser- 

 vations. It was put in order before the observations of May 8, when it appeared 

 to be perfectly tight. 



J The temperature of equilibrium appeared to fall in this set of observations 

 from near 123°.5 to near 1210.5. 



§ From a sliort set of observations in which the temperature was not well 

 controlled. 



II Nickel connecting bar found apparently loose at connection with core at 

 end of series of observations. 



