264 
ABNORMAL VARIATIONS OF ATMOSPHERIC PRESSURE, 
APPENDIX L—Continued. 
Date. 
Daily mean. 
Amount 
of variation. 
1853. 
December 27_ 
30. 060 
28. 
29. 940 
29.. 
. 922 
30.-.. 
30. 132 
31. 
30. 102 
0. 176 
1854. 
January 1_ 
30. 020 
+ 
. 094 
2. 
. 012 
+ 
. 086 
3. 
29. 995 
+ 
.069 
4. 
. 828 
. 098 
5_ 
. 690 
— 
. 236 
6_ 
30. 012 
+ 
. 086 
7_ 
. 175 
+ 
. 249 
8. 
. 082 
+ 
. 156 
9. 
29. 942 
+ 
. 016 
10_ 
. 928 
+ 
. 002 
11_ 
. 952 
+ 
. 026 
12.. 
.745 
. 181 
13. 
.737 
— 
. 189 
14_ 
. 617 
— 
. 309 
15-... 
29.750 
— 
0. 176 
Date. 
Daily mean. 
Amount 
of variation. 
1853. 
January 16_ 
29. 867 
0. 059 
17_ 
. 942 
“f~ 
. 016 
18-.. 
. 807 
. 119 
19-.. 
. 637 
— 
. 289 
20. 
30. 070 
+ 
. 144 
21_ 
. 160 
+ 
. 234 
22... 
. 097 
+ 
. 171 
23.. 
29. 982 
+ 
. 056 
24_ 
. 902 
. 024 
25.. 
. 807 
— 
. 119 
26_ 
. 970 
4* 
. 044 
27_ 
30. 080 
+ 
. 154 
28-. 
. 022 
+ 
. 096 
29.. 
. 012 
+ 
. 086 
30. 
. 005 
+ 
. 079 
31-.. 
29. 870 
. 056 
February 1_ 
. 710 
— 
. 216 
2_ 
. 857 
— 
. 069 
3. 
.875 
— 
. 051 
4-. 
. 830 
— 
. 096 
5.. 
29. 880 
— 
0. 046 
Mean for January, 29. 926. 
Observations at Great Salt Lalze, from Captain Beckwith's survey. 
Date. 
Daily mean. 
Amount 
of variation. 
1853. 
Nov’r 29. 
25.754 
+ 0.086 
30---.. 
.833 
+ . 165 
Dec’r 1. 
.840 
+ . 172 
2. 
.800 
+ . 132 
3.. 
.781 
+ . 113 
4 9 a. m. 
.736 
+ . 068 
5. 
.738 
+ .070 
6 .. 
. 903 
+ .235 
7__ 
. 912 
+ .244 
8. 
. 835 
+ . 167 
9--.. 
. 552 
— . 116 
10_ 
•416 
— . 252 
11_ 
.429 
— .239 
12. 
. 636 
— . 032 
13.. 
. 396 
— . 272 
14. 
. 331 
— . 337 
15 9 a. m. 
.378 
— . 290 
16. 
. 667 
— . 001 
17 9 a. m- 
. 673 
+ . 005 
18 9 a. m- 
. 689 
+ • 017 
19. 
. 692 
-j- . 024 
20_ 
.494 
— . 174 
21_ 
.483 
— . 185 
22 9 a.m. & 12m. 
. 613 
— . 055 
23. 
. 647 
— .021 
24_ 
. 530 
— . 138 
25 ded’d fm. Ft. 
Yuma . 452 
— . 216 
26... 
. 623 
— . 045 
27. 
. 670 
+ . 002 
28. 
.525 
— . 143 
29.. 
.550 
— . 118 
30 9 a. m. 
. 770 
4- . 102 
31 9 a.m. & 12m. 
25. 913 
4- 0.245 
Mean for Dec. 25.668 
Date. 
Daily mean. 
Amount 
of variation. 
1854. 
January 1___ 
2. 
25. 820 
3. 
. 538 
4. 
. 395 
5. 
. 594 
6.- 
. 849 
7. 
26. 000 
8. 
9 9 a. m- 
25.701 
+ 
0. 086 
10-.. 
.768 
4- 
. 153 
11_ 
. 578 
. 037 
12.. 
. 290 
— 
.325 
13. 
. 146 
— 
.469 
14. 
. 001 
— 
. 614 
15. 
. 149 
— 
.466 
16.. 
. 304 
— 
. 311 
17.. 
. 276 
— 
. 339 
18. 
. 385 
— 
. 230 
19.. 
. 118 
— 
.497 
20--.. 
. 819 
+ 
.204 
21... 
.737 
+ 
. 122 
22.. 
. 954 
4- 
. 339 
23. 
.866 
+ 
. 251 
24. 
. 639 
+ 
.024 
25. 
.450 
. 165 
26. 
.818 
+ 
.203 
27. 
.948 
4- 
.333 
28-.. 
. 917 
4- 
. 302 
29 9 a. m_ 
. 897 
+ 
.282 
30. 
31 9 a. m_ 
25. 866 
+ 
0. 251 
Mean for Jan., 25.615 
