THERMOMETER, AND RAIN. 587 
MR. HENRY HOUGH WATSON’S ACCOUNT OF THE EVAPORATION OF WATER 
FROM A CYLINDRICAL VESSEL OF TEN INCHES DIAMETER, KEPT NEARLY 
FULL, AT BOLTON. 
January 
February, 
March.... 
April ... 
May.... 
June... 
July:.. 33 
August... 
Septem. 
October. 
Novem.. 
Decem.. 
183111832. '1833.]1834.11835.]1836.|1837.|1838.]1839.|1840.|Mean 
— | —qj|_]q—|— | qj] q—_— ) —_ \c_- —_— 
COrr Ww Www 
ashe atin | | 
mon S10 to 
pies) VSS | ea i Sh ee | iets ee |e ee 
oA. 23|24.18|23.78|24.36|17.12|20.16 
* The gauge in the winter season sometimes got damaged by the frost ; and, in con- 
sequence, the amount of evaporation could not be determined. 
