Prof. J. Brocklesby on the Influence of Color on Dew. 185 
It is impossible from these results to detect — controlling in- 
fluence in color, but the fact, that the least amount of moisture 
was gained by the black, in two cases out of tibie. and that it 
holds the lowest rank in the table of averages, is not in accord- 
ance with the experiments of Dr. Stark. 
Six white pasteboard cards were ier — ig to the 
same pack, and presenting the same extent of s 
were equalized in weight in the manne Fe iguabeaee and at 
first painted on one side as foll ow 
| Card. a { Color. 
eT ee Vermilion. Red.’ 
B, Gamboge. Yellow 
Rg a LI8 Prussian Blue and Gamboge. Green, 
ade India Ink. Black. a 
ogc et" hea thant color of the paper. White. 
ry I Blue. 
_ Thus jc ibaned, they were exposed on the grass plot, during five 
ized. At the close of the third trial, they were each painted on 
the remaining side, the colors being interchanged in the follow- 
ing manner.—B, red; A, yellow; F, green; E, black; C, blue; 
D, being turned over afforded a white ground. 
In the fourth and fifth trials, these ‘second surfaces weré ex- 
posed. The table below presents the results of this investigation. 
1st.—Sept. 3d. 2d.—Sept. 10th. 3d.-—Sept. 15th. 
gf) 3 se] EE | LS |e! £ 3 sis 
aaa &: (28152 | 6 [68] 87] 62 [68 
h 7 grs. . inches. pwis. grs.| gr8 Jinches.| pwts. grs.| grs. 
A. Red, _ |ies3P 23 | ‘ 12:33 | 2 20 10 {1233/2 91 | °6 
B. Yellow,. . «| i 2 i coe) F 
C. Green, . . « Sut Tg oe ve wy « “ 6 | G 
D. Black, . . e | Pe Me cng st! eB ses 64 
E. White, . . « «| 49 “ a4] 4) “ ee els. & 
Piles: ee “ Rae. «149 “ « «bh 4Q ee ve ee «138 
4th —Sept. 22d. 5th Sept. ept. 24th. 
lx ak d Bs a es 4 
~» |3i| € ae | Be 
PS a5 a8 | ma 6s | 66. 
wis. grs. grs. inches. pwts. grs grs. 
B. Red, ya 23 | 15 | 1233.) 2 2 31 
A. Yellow, i iS ot oe! a Ce 
F. Green, ieee || 8 «ce ea 34 
E. Black, oe &* 16 “ te . ee 33~ 
D. White, a Bae 17 “ ea 36 
Cc. Blue, és sf 18 te “ “ 36 
