182 OBSERVATIONS ON THE FALL OF RAIN. 
through this period reached the valley, no obser- 
vations have been taken, but some very careful 
measurements at particular times, throw a good 
deal of light upon the rapidity and extent to 
which the water of heavy rain flows off the 
ground.* 
The months of February and March were dry 
months, the rain being much below the average. 
The month of April was remarkably wet, a 
greater quantity of rain falling in that month than 
in any other previous April for many years. May 
was a little above the average. In June the rain 
for the entire month was below the average, but 
it ali fell in the first ten days; it was nearly con- 
tinuous rain during eight of them. During this 
period of the month the following observations 
were made. 
The ground was perfectly saturated at the 
commencement of the month, the river being 
* In the course of the present year some works will be 
completed for gauging every drop of water flowing from an 
extensive portion of the district, and from the daily register 
which will be kept, means will be afforded for ascertaining 
the results under all circumstances. These observations will 
extend over a period of five years. 
