628 
KANSAS CITY REVIEW OF SCIENCE. 
The red glow at sunset and sunrise still continues, though less noticeable, 
perhaps, than in December. 
The comet during the past ten days has been distinctly visible to the naked 
eye, and its position is 30° above the horizon at 8 P. M. in the W. SW. 
The usual summary by decades is given below. 
Temperature of the Air. 
MiN. AND Max. Averages. 
Min 
Max 
Min. and Max 
Range 
Tri-Daily Observations. 
7 a. m 
2 p. m 
9 P- m 
Mean 
Relative Humidity. 
7 a. m 
2 p. m 
9 P- m 
Mean 
Pressure as Observed. 
7 a. m 
2 p. m 
9 p. m 
Mean 
Miles per Hour of Wind. 
7 a. m 
2 p. m 
9 p. m. 
Total miles 
Clouding by Tenths. 
7 a. m 
2 p. m. ......... . 
9 P- m 
Rain. 
Inches 
Dec. 20th 
to 30th. 
15° 
42.0 
28.5 
27° 
21 o 
34-5 
25.0 
26.6 
.98 
•93 
■94 
.95 
28.912 
28.942 
29.130 
28.961 
10.7 
II. 2 
10.9 
2777 
6.0 
7.1 
4.9 
0-25 
Jan. 1st 
to loth. 
-22.5° 
38.0 
30-3° 
60.5° 
—55 
12.4 
3-4 
5-o8 
.89 
.80 
.82 
.84 
29.251 
29.231 
29.272 
29255 
II. o 
18.2 
II. 6 
3272 
8.0 
6.2 
4.0 
0.15 
Jan. loth 
to 20th. 
-4.0 
53-0 
28.5 
57.0 
17,0 
37-4 
24-3 
26.23 
•83 
.80 
.82 
.81 
29.210 
29.190 
29.225 
29.208 
9-3 
24-5 
14.8 
3896 
5-0 
3-8 
2.7 
0.25 
Mean. 
14- 1 5 
28.1 
17.6 
19.97 
.90 
.84 
.85 
.86 
29.124 
29.121 
29.209 
29.151 
10.3 
17.9 
12.4 
9945 
6.3 
5-7 
S« 
065 
A NEW THEORY OF DEW. 
PROF. B. F. NIHART, A. M. 
Investigations which Prof. Stockbridge has made at the Amherst Agricul- 
tural College, upon the comparative temperatures of the soil and air, and the 
deposition of dew upon the earth and plants, have led him to conclusions very 
different from those commonly received in regard to the formation of dew. It is 
usually held that dew is the moisture of the air, condensed through contact with 
objects of a lower temperature, and that it does not form till radiation has re- 
duced the temperature of the earth and other objects below that of the atmosphere. 
The experiments referred to seem to indicate that as regards objects in the im- 
mediate vicinity of the earth at least, the process is the converse of this; viz., 
