WISLIZENUS — ATMOSPHERIC ELECTRICITY . 
115 
7 # 
Additional BemarJcs on Atmospheric Electricity. 
By A. Wislizenus, M.D. 
The delay in the publication of this volume enables me to 
add to my observations of atmospheric electricity in 1861, 
the result of my observations iii 1862. The latter observa- 
tions have been made in the same manner and by means of 
the same fine glass thread, which, after many thousand tor- 
sions, proves as good as ever. I present herewith in tabular 
form the general result of my observations in 1861 and 1862, 
I. Monthly mean of Positive Atmospheric Electricity in 1861 and 
1862, at St. Louis , Mo., based upon daily observations at 6, 9, 12, 
3, 6 and 9 o’clock , from morning till night. 
Mean of 
Jan. Feb. Mar. Ap’l. May. Jun. Jul. Aug. Sept. Oct. Nov. Dec. Year. 
1861^.16.5 12.1 9.8 8.8 7.8 4.0 3.7 3.4 3.0 7.1 10.0 14.3 8.4 
1862.. .12.1 16.0 9.4 10.6 7.5 3.0 2.2 2.3 ,3.0 7.7 12.6 13.9 8.4 
* This table of 1861 differs in some decimals from that published on page 66 and in Dia- 
gram No. 1. Having discovered some errors, I calculated all my observations once more, 
and give now the present as the corrected table. 
II. Monthly mean of Temperature and of Relative Humidity in 
1861 and 1862, at St. Louis , Mo., based upon daily observations , 
cotemp or aneous with those of Atmospheric Electricity. 
Jan. Feb. Mar. Ap’l. May. Jun. Jul. Aug. Sept. Oct. Nov. Dec. Year. 
1861. ..32.2 40.4 44.8 58.1 64.1 76.9 77.5 78.6 69.1 57.9 46.0 39.7 57.1°f. 
42.6 4L3 56.4°j? 
1862.. .28.9 30.2 43.2 55.0 69.7 75.1 81.2 80.7 72.1 
RELATIVE HUMIDITY. 
Mean of 
Jan. Feb. Mar. Ap’l. May. Jun. Jul. Aug. Sept. Oct. Nov. Dec. Year. 
1861.. .72.2 63.3 64.5 61.5 66.3 70.8 66.3 69.6 77.3 76.6 69.0 74.3 69,5 
1862.. .85.3 73.9 70.8 67.0 57.3 67.0 66.8 64.3 74.2 67.2 69.5 74.6 69.8 
III. Yearly mean of Positive Electricity of Temperature , and of 
Relative Humidity of the Atmosphere , at the hours of 6, 9, 12, 3, 
6 and 9, from morning till night , based upon daily observations at 
these hours through the years 1861 and 1862, at St. Louis , Mo. 
1861 . 
1862. 
1861 . 
1862 
ELECTRICITY. 
At 12 M. At3P.: 
... 9.2 7.9 
48.9° F... 54.9 61.6 
48.9 55.0 60.9 
63.6 
62.3 
RELATIVE HUMIDITY. 
71.3 
... 57.2 
... 57.5 
At 6 P.M. At 9 P. ! 
..8.7 ...... 6 
59.3 ...... 54.3 
58.0 ...... 53,6 
65.1 
67.6 
V) 
77.3 
78.0 
