679 Meteorological Observations. 
Account of the Evaporation Srom Water, in a Cylin= 
adrical Vessel of 10 inches diameter, kept nearly 
full, at Manchester. 
1799. 1800. 1801. || Mean Evap. 
Inch. Inch. Inch. Inch. 
Jan. ——| 1.5 * 
Feb. ——|2,0* 
Mar,| t. 082 | 3. 700| —-———| 3. 5 * 
April} §. 398 | 4. 760) ———| 4. 5 * 
May | 5. 050 | 5. 228] 4. 600] 4. 959 
June] 7. 702 .| 5. 207.| 6. 551 | 6: 487 
July | 5. 157 |. 5. 679| 6. 048] 5. 628 
Aug.| 6. 000 || 6. 376| 5. 798| 6. 058 
Sept.| 4. 340 | 3. 986| 3. 368] 3. 898 
Oct.| 3. 337 | 1. 998] 1. 718] 2. 951 
Noy.| 2. 428 | 1. 600] 2. 098 | 2. 042 
Decsiia.' 384 —| i. 5 * 
| eer 
44. 4Ann,Ev. 
N. B. Those means marked * are conjec- 
tural; the frost in the winter season usually 
damaged the gage. 
The mean annual evaporation from soil co- 
vered with grass, or from green ground, exclu- 
‘sive of dew, was at an average for the three years 
above, 233 inches, (See page 361 for the three 
years preceding. ) 
