324 Nine Inch Conical Rain Gage. 
expense. If the base of the cone be six inches in diameter the pattern 
will be a sector of 113° 50’, of a circle of 9.49 inches radius. ‘The 
chord of this sector is 15.9 inches. The scale for this gage may be 
made by any person who understands the use of the common scale di- 
vided into inches and their decimals, by graduating a wooden rule, 
with a face of paper pasted on it, according to the numbers given in the 
table. The face ought to be varnished to protect it from the effects 
of the water adhering to the measuring stick. 
The maximum of this gage is three inches, which exceeds the fall 
of rain from the heaviest shower. It must be a considerable rain that 
will produce one inch. The oftener the observations are made the 
more correct will be the account. 
The following is a specimen of observations sonle with this gage. 
1832, April 17 “ : 0.46 
: 1g = - - 0.90 
19 - - 0.22 
20 2. 5= - - 0.13 
28 A. M. - 0.47 
wae ge - - 0.01 
30 - - 0.50 
May 1 - - - 0.06 
5 - - 0.37 
- - 0.24 
15 - ~ 0.44 
9 - - - 0.32 
25 A. M. - - 0.47 
