during a Storm. 327 
times the salt that the former water had. 
This excess was more than I expected; and 
as the tub was at the time aécessible to others 
besides myself, I thought it possible that 
some salt might have been imparted to the 
water in addition to that brought by the wind. 
Another thought occurred; the water of 
my rain-gage was the produce of the storm 
chiefly ; and, not having been in contact with 
the slates of the house, it appeared to be un- 
exceptionable. I examined it and found it 
to contain | grain of salt in 7500 water; it 
was of course very sensible to the test of ni- 
trate of silver. Reflecting upon this result, 
I was led to suspect that the bottle receiving 
the rain, being of earthenware, and glazed 
with common salt, was not a suitable vessel 
to contain water in the present case. This 
threw a doubt upon the result from the gage- 
water. However, the produce of a succeed- 
ing rainy day was also examined, and it was 
found to contain + of a grain of salt in 7500 
water. he disproportion of salt in the two 
cases is very great; but why was there any 
salt at all in the last water? It cannot, I 
think, be referred to any other source than 
the glazing of the bottle. If this be allowed, 
the time the water remains in the bottle will 
have some influence on the quantity of salt 
