Fig. G represents a case of the potential disturbed by rain. On the night 

 of April 27, 1897, rain began to fall from 9.50 p. m. and continued to the morning of 

 the 28th. There was a heavy fall between 5.10 a. m. and a. m., on the 28th. 

 It ceased completely at 9. 10 a, m. 



Fig. 7 is a case of snowfall. On Jan. 21, 1900, snow began to fall at 6.15 a. m., 

 continuing all the day, until at 6.30 p. m., the fall began to decrease and was ac- 

 companied by rain. The precipitation ceased completely at 9.55 p. m. 



