306 REV. G. HENSLOW ON EVAPORATION 
III. EVAPORATION IN A SATURATED ATMOSPHERE. 
Some cotton-wool, saturated with distilled water, and weighing 
9:715 grammes, was suspended in the glass jar as described. The. 
losses in weight were as follows :— 
Weight in 
gramnies, Loss per cent. | Temp. (W. & D.). 
November 9th. o 
8 A.M. 95716 |. | ..... 53 
6.30 p.v. 9710 *005 53 
November 10th. 
8 A.M. 9700 010 56 
6 P.M. ` 9:695 *005 565 
November 11th. 
8 A.M. 9:670 025 52 
6 P.M. 9:660 010 525 
November 12th. 
8 a.m. 9:645 015 51 
5.30 p.m. 9:630 *015 49 
November 13th. . 
9 A.M. 9:615 *015 “49 
TPM. 9:600 015 47 
November 14th. 
8 am. 9:585 015 44 
5 PaL 9:580 005 46 
November 15th. 
8 a.m. 9:565 *015 43 
November 16th. 
8 A.M. 9:540 025 40 
November 17th. 
9 a.m. 9:525 O15 45 
The total loss was ‘255 gramme, or on an average °0232 gr. 
per day. 
From Nov. 17th to Dec. 1st, or a fortnight, the cotton-wool was 
keptin the jar, which was completely closed during the whole 
time. On Dec. 1st it weighed 9'235 grammes, so that it had lost 
0217 gr. per day. 
A piece of sponge weighing 18:006 grammes and saturated 
with distilled water was suspended in the same manner, and lost 
weight as follows :— 
