164 
On Evaporation. 
Quantity of Evaporation from 
July. 
Temperature of 
Temperature 
cylinder, freely exposed to the 
Lake Seneca. 
of air. 
sun and wind. 
DAY. 
MGHT. 
18 
TS-^ 
66^ 
•50 
•05 
19 
70 
78 
•35 
•00 
20 
70 
76 
•40 
•03 
21 
70 
76 
•47 
•05 
22 
70 
78 
•31 
•00 
23 
70 
76 
•40 
■00 
24 
72 
76 
•20 
•00 
25 
71 
70 
•20 
•05 
26 
71 
69 
•50 
•00 
27 
71 
54 
•55 
•00 
2S 
72 
60 
•42 
•08 
29 
70 
70 
•48 
•05 
30 
72 
74 
•50 
•05 
31 
72 
71 
•15 
• -00 
A cylinder placed at different distances from the ground, will 
show different results of evaporation, particularly at night. Upon 
those nights when a heavy dew fell, I could detect no evapora- 
tion, although the thermometer stood at 63°, while upon those . 
evenings, under the same temperature, when a scarcely percepti- 
ble dew had fallen, it amounted to O^OS of an inch. It would 
seem from information derived from written records, kept during 
the settlement of the country in this vicinity, in the latter part of 
the past century, that the climate has become much modified. A 
gentleman, under date of 1798, thus writes from the Genesee 
country : 
" You will find that the climate of the Genesee country not 
only forms a very interesting part of its advantages, but also of 
its natural history. Those parching heats that on the south side 
of the Alleghany mountains seem to dry up every particle of 
nourishment from the plants, are never known in this country; in 
almost every instance, a hot day is succeeded by a plentiful 
shower, which preserves, throughout the summer, a constant ver- 
dure; by this means our pastures and meadows are not to be 
excelled in the world. The nights are in proportion cool, and a 
traveler from the coast is surprised to iind, in the dog days, a 
couple of blankets a comfortable coveiiing. Late frosts in the 
spring, and early frosts in the fall, are uncommon, and almost in 
no instance has the fruit or corn suffered by them. The peach 
trees, the great test of a climate free from severe and late spring 
frosts, come to great perfection. In one orchard, at an old Indian 
town near Geneva, the occupier of the farm sold to a neighboring 
distillery last year, near 100 bushels of peaches. 
" In the winters of 1796 and 1797, two gentlemen kept a regu- 
lar diary of the weather; the one at Bath, in Steuben county, the 
other at Lancaster, in Pennsylvania. The result was, that at 
