GOO 
METEOROLOGICAL OBSERVATIONS, 
Daily and Monthly Barometric Means at Columbia Barracks , 1853. 
Observations at sunrise, 9 a. in., 3 p. in., and 9 p. m. Readings corrected to 32°. 
No. 
July. 
August. 
September. 
October. 
November. 
1... 
30. 051 
29.818 
30. 026 
30.185 
2... 
— 
.097 
.709 
.036 
. 150 
3. 
— 
.037 
.891 
29. 968 
.271 
4. 
— 
29. 960 
30. 150 
. 915 
.205 
5. 
— 
.981 
.034 
30. 031 
29.880 
6. 
— 
.971 
29. 951 
.049 
.816 
7. 
— 
30.016 
.847 
29. 897 
.913 
8. 
— 
.098 
.729 
.843 
30.013 
9. 
— 
.119 
.757 
.652 
29.934 
It). 
— 
29. 951 
.882 
.728 
.709 
n. 
— 
.799 
30. 003 
. 672 
.916 
12. 
— 
-.804 
29. 741 
.989 
.687 
13. 
— 
.924 
.732 
30. 075 
.810 
14. 
— 
.843 
. 558 
29. 908 
30. 116 
15. 
— 
.782 
. 532 
.924 
. 120 
16. 
— 
.919 
.642 
.902 
29. 904 
17. 
— 
.907 
.824 
.823 
.817 
18. 
— 
.952 
30. 043 
30. 009 
.738 
19. 
30. 082 
.985 
29. 974 
. 137 
.772 
2(). 
.010 
30. 047 
.908 
.275 
.824 
21. 
29. 822 
29. 957 
.874 
. 164 
.787 
22. 
.829 
.863 
.796 
. 175 
30. 165 
23.. 
30. 037 
.874 
.710 
.012 
29.905 
24. 
29. 989 
.873 
.753 
29. 874 
.814 
25. 
.855 
.836 
.925 
30. 047 
.394 
26. 
.807 
.818 
.876 
29. 936 
*. 134 
27. 
.845 
.840 
.883 
30.183 
— 
28;. 
.864 
.837 
30. 010 
.253 
— 
29... 
.835 
.797 
29.917 
. 198 
— 
30. 
.980 
.775 
.914 
.080 
— 
31. 
30. 014 
.834 
. 235 
— 
Monthly mean at sunrise. 
29. 951 
29. 940 
29. 866 
30.103 
29. 878 
Monthly mean at 9 a. m. 
29. 940 
29. 947 
29.854 
30.101 
29. 870 
Monthly mean at 3 p. m. 
29. 887 
29. 886 
29.826 
30. 098 
29. 924 
Monthly mean at 9 p. m. 
29. 905 
29. 897 
29. 842 
30. 098 
29. 925 
Mean.. 
29. 921 
29.917 
29. 847 
30.100 
29. 899 
Mean for 131 days, 29. 939 inches. Altitude of Columbia Barracks, 57. 6 feet. 
A remarkably low point, occurring at all Pacific stations. Two observations only, at sunrise and 9 a. m. 
