NO. 7.] 



HORIZONTAL INTENSITY. 



105 



') The thermometer belonging to the vibration-box was taken out, and another thermometer, on which 

 the divisions went considerably lower was put into the box through a hole. 2 ) The revolver lay east and 

 west, 4 pares directly north of the magnet. 3 ) The revolver laid aside. 4 ) The magnet moving rather 

 irregularly. This is perhaps due to movement in the ice? ) The magnet quieter. 



14 



