BAROMETRIC OBSERVATIONS, 
249 
OBSERVATIONS—Continued. 
Station. 
Date. 
Hour. 
No. of barometer. 
First reading. 
Attached thermome¬ 
ter. 
j Air thermometer. 
Reading corr. for con¬ 
stant error, temp, 
andhor. variation. 
1853. 
Bivouac 2', New 
Dec. 31 
3 p. m_ 
783 
23.479 
52. 3 
23. 447 
Tear’s Spring. 
7. 30 p. m. 
783 
.455 
32. 7 
. 442 
1854. 
9 p. m_ 
783 
.467 
32. 5 
.441 
Do. 
Jan. 1 
783 
. 497 
34. 5 
. 462 
9 a. m_ 
783 
.528 
38. 2 
.434 
Bivouac 3 1 . 
-do- 
Sunset.... 
783 
23. 702 
_ 
_ 
23. 693 
Do. 
Jan 2 
783 
. 723 
26. 5 
. 674 
9. 40 a. m. 
783 
. 897 
42. 6 
. 788 
Station 1_ 
_do_ 
783 
23. 690 
53. 6 
23. 551 
Station 7__ 
_do 
1. 07 p. m 
783 
23. 874 
58. 7 
23. 797 
Station B—valley. 
-do- 
1. 30 p. m. 
783 
23. 934 
58. 7 
23. 869 
Bivouac 4 1 .__ 
-do.... 
3 p. m_ 
783 
24. 104 
59. 3 
24. 055 
Sunset.... 
783 
.048 
44 
. 026 
Do.... 
Jan. 3 
783 
. 004 
38. 3 
23. 930 
9 a. m_ 
783 
. 040 
48. 8 
. 922 
Station 3_ 
783 
25. 008 
69. 8 
24. 931 
Bivouac 51__ 
_do_ 
783 
25. 046 
68. 5 
24. 984 
Sunset_ 
783 
.006 
52. 3 
. 964 
Do. 
783 
24. 898 
23. 5 
. 856 
9. 15 a. m. 
783 
. 915 
47. 4 
. 800 
Station 2_ 
-do- 
11.30 a. m. 
783 
24. 953 
55.5 
24. 820 
Bivouac 6 l . 
-do-... 
4.10 p. m.. 
783 
24. 454 
54. 8 
24.423 
Do. 
783 
. 426 
37. 6 
. 353 
8.50 a. m.. 
783 
.415 
39. 5 
. 317 
Station 1_ 
_do_ _ 
783 
24. 167 
38. 5 
24. 090 
Bivouac 7 1 .. 
-do- 
4 p. m_ 
783 
23. 584 
48. 3 
23. 569 
Do. 
Jan. 6 
Sunrise 
783 
. 584 
29 
. 595 
Camp 94, New 
-do- 
3 p. m_ 
783 
23. 496 
38 
23.492 
Year’s Spring. 
Camp 97_ 
783 
25. 020 
47. 3 
24. 895 
Bivouac l 3 _ 
_do_ 
3.25 p. m.. 
783 
25. 082 
55. 5 
25. 044 
Sunset.... 
783 
. 061 
41. 7 
. 044 
Do. 
783 
24. 908 
14. 5 
24. 886 
9 a. m_ 
783 
. 970 
38.4 
. 875 
Bivouac 2 3 . 
-do- 
3 p. m.... 
783 
25. 034 
66. 8 
. 966 
783 
. 172 
49. 8 
Do ... 
Jan. 13 
783 
24. 957 
27. 5 
. 906 
10.10 a m. 
783 
25. 071 
52. 5 
. 936 
Station 6. 
-do—. 
3 p. m_ 
783 
25. 187 
67.5 
25. 117 
Bivouac 3 3 _ 
-do_ 
3.55 p. m.. 
783 
25. 072 
57. 8 
25. 024 
Do. 
Jan. 14- 
783 
24. 966 
31. 5 
24. 906 
Bivouac 4 3 _... 
-do- 
12.40 p. m. 
783 
24. 514 
50.5 
24. 438 
Sunset .... 
783 
.492 
48 
.460 
Do. 
Jan. 15 
783 
. 362 
24. 8 
. 318 
8.35 a. m.. 
783 
. 444 
28.3 
...... 
.371 
Camp 99. 
-do.-.- 
3 p. m_ 
783 
25. 016 
55.5 
24. 972 
Corrected mean ba¬ 
rometer reading. 
Wind. 
Clouds. 
.2 
*■+3 
o 
s 
<6 
o 
L* 
o 
w. 
1 
Cirrus, 2__ 
0 
0 
Cirrus, 2. 
0 
Stratus, 4 .... 
E. 
N.E ... 
N.E ... 
N.E_ 
5 
2 
2 
1 
Stratus, 3 .... 
Stratus, 5_ 
Stratus, 6 . ... 
Stratus, 6 .... 
Stratus, 6 .... 
Nimbus,, 9_ 
S.E. ... 
S.E_ 
4 
4 
S.E_ 
N.E ... 
N.E... 
2 
4 
2 
0 
0 
0 
0 
0 
0 
5 
0 
1 
Nimbus, 9_ 
Nimbus, 10_ 
Nimbus, 10_ 
Cirro-cum., 7 . 
Cirro-cum., 7 . 
Cirro-cum., 4 . 
Cirrus, 2_ 
Nimbus, 6.... 
N.N.W. 
Cirro-stratus, 5 
Cirrus, 1. 
. 
S. 
0 
3 
4 
2 
2 
1 
2 
Nimbus, 9.... 
Nimbus, 8.... 
Nimbus, 10_ 
Nimbus, 10... 
Cirro-cum., 3 . 
Cirro-cum., 1 . 
Cirro-cum., 5 . 
N.E ... 
S. 
s. 
s...... 
N.E ... 
S.E_ 
January 1.—The day warm ; the night somewhat hazy. 
January 2.—The day and night calm and clear. 
January 3.—The day pleasant; the evening mild and clear, with a light an from the east. 
January 4.—Cold wind at sunrise ; light stratus clouds near horizon ; the day pleasant and the wind mild; stratus 
clouds banding the sky. 
January 5. —Sunrise, the day commenced with gusts of wind from the southeast and with stratus clouds, which soon 
spread unto nimbus; and after midday, storms of snow covered the higher mountain tops. The clouds broke away 
towards evening just sufficiently to form a gorgeous sunset, casting a lurid hue over the landscape. 
January 6.—At sunrise and during the morning, there was a driving sleet. The clouds disappeared at sunset, hut the 
misty blasts continued to blow from the northeast. The peaks of San Francisco, now visible, are again white with snow. 
January 11.—At 9 p. m., clouds, cirrus, 5 ; halo around moon 22° diam.; no wind. 
January 14.—As the moon approached the horizon, nimbus clouds rose from the S.W., and passing rapidly towards the 
N.E., soon covered the sky. At the same time a stiff breeze blew from the N.E., showing an upper and lower current in op¬ 
posite directions. The day was cloudy, with strong wind from the south, which at night brought hail, rain, and a little snow. 
January 15.—Sunrise, sky clear; a cold breeze blowing; clouds passing towards the east. 
32 m 
