Description of an Improved Rain Gage, 

 Table 3. 



329 



An example shewing the vse of the tables. 

 Suppose the weight of the water in the gage, corrected 

 by subtracting the weight of the gage, to be 20lb. 5i oun- 

 ces avoirdupois, required the height or nunnber of inches 

 of rain ? 



1. From Table 2. fllb.= 

 lb. oz. I 4 oz. 



20 51 = ^ 1 do. 

 I ^do. 



70(0gr. which X 20 = 14000 

 = 1750 



= 437.5 



= 218.75 



The sum = the weight in grs. 143406.25 



2. If the weight, reduced to grains, be found in table 3d. 

 the corresponding height will be found opposite to it in the 

 adjoining column ; but as, in this example, it is not, take 

 the nearest, less, number to it from the table, and subtract 

 it from the weight of the water, marking the corresponding 

 Vol. VII.— No. 2. 42 



