of Rain.—Appendiz. 371 
to determine; neither have we data to ascer- 
tain what is the least velocity of the wind 
which will bring it to this distance from the 
sea. 
From what has been advanced, it may be 
presumed that the fact of sea-water being 
occasionally carried by the force of the wind 
many miles into the interior of a country, 
cannot be doubted. We have further ascer- 
tained in a certain degree the proportion of 
sea-water which may be expected in rain- 
water on such occasions; this may be of use 
as a term of comparison for other times and 
places. It remains to make a few observa- 
tions upon the utility likely to attach to this 
investigation. | 
It is a well known fact that sea-air has a 
powerful influence on the animal and veget- 
able creation. Certain diseased constitutions 
are greatly improved by it; others are in- 
jured in nearly the same degree; yet chemists 
have not hitherto been able to distinguish air 
collected over the midst of the Atlantic ocean, 
from that brought from the interior of a con- 
tinent ; nor town air from country air. Now if 
the spray from the foaming waves be liable to 
be wafted away to a considerable distance by 
the breeze, evenin the driest state of the atmos- 
phere there must be particles of salt floating 
