8 
AMERICAN GEOLOGY. 
Latitude. 
42° 42' 
43° 6' 
46° 47' 
Mean 
Rain 
Place. 
an. temp. 
in inches. 
Rochester, 620 ft. above 
tide water 
(11 years),. 
47*48 
27*16 
Barometrical mean,. 
29*56 in. 
Range,.. 
1*34 
Malone,. 
52*66 
Penn Yan (16 years),. 
46*87 
27*8 
Utica 437 ft. above tide water (5 years), 
46*35 
44*12 
Barometrical mean,. 
29 64 in. 
Range,. 
2*03 
Syracuse—barometer (400 
feet),. 
29 33 
Range, .. 
2*26 
Salem, Mass. (33 years), ... 
48*65 
Williamstown, 595 ft. above 
tide water 
(23 years). 
45*59 
37*48 
Montreal (3 years), 
do 
41*07 
Snow 
in inches. 
65-85 
Rain 
in inches. 
18-60 
Warmest day,. +90 
Coldest,. —13 
Quebec, 340 ft. above tide water,. 37-19 
Detroit,.. 52*66 
Brunswick, Me. (11 years),. . 
Mean temperature for latitude of 41° 43', 49*75 
do do do 42 c 43', 48*15 
32-79 
37-15 
Decrease of temperature by elevation, one degree for every 325 feet, for 
New York. 
Mean temperature for the state of New York, reduced to the standard of 
Albany and level of the sea, 48'95. 
Mean quantity of rain, in inches, 39'55 
Mean quantity of rain for places near the lakes, and western courses, 24‘52 
inches. Thus Lewiston has only 20*40 inches of rain, Ogdensburgh 24*61 
inches, and Rochester only 28*69 inches. 
The area of the state of New York is 48,000 square miles. 
I have no observations which show how much of the rain 
evaporates, and how much passes off in drainage. The tribu¬ 
taries of the Ohio river* rise over an area of 24,337 square 
* Smithsonian Contributions, by Charles Ellet, jr., Civil Engineer. 
