124 
DETERMINATION OE ALTITUDES BY BAROMETER. 
Data.—Observations in Canada de las Uvas —Continued. 
Date. 
Station. 
Hour. 
Reading 
of barometer. 
Attached 
thermometer. 
Detached 
thermometer. 
Altitude by spi¬ 
rit level above 
depot camp. 
Distance from 
depot camp. 
1853. 
h. m. 
Inches. 
o 
o 
Fed. 
Fed. 
October 3- 
Camp. 
12.00 m. 
27,087 
88. 0 
88. 0 
1,772.4 
192,315 
Camp. 
3. 00 p. m. 
27,025 
86. 0 
87. 0 
1,772.4 
192,315 
Camp. 
6. 20 p. m. 
26,965 
62. 0 
62. 0 
1,772.4 
192,315 
October 4_ 
Camp. 
6. 00 a. m. 
26, 975 
48.5 
50. 0 
1,772.4 
192,315 
Eesults obtained by computation. 
Date. 
Station. 
nour. 
Altitude by barometer abov< 
computed by— 
depot camp, 
Differences between altitudes determined 
by barometer and spirit level. 
Old method, using 
Lee’s tables. 
New method, using 
observed air tem¬ 
peratures. 
New method, using 
mean daily air 
temperatures. 
Old method, using 
Lee’s tables. 
New method, using 
observed air tem¬ 
peratures. 
New method, using 
mean daily air 
temperatures. 
1853. 
h. m. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Feet. 
Sept. 
28 
37 & 58 
5. 00 p. m. 
219. 9 
213. 7 
195. 2 
— 26.5 
— 20. 3 
— 1.8 
56 
4. 15 p. m. 
403. 2 
401. 8 
383.1 
— 18. 9 
— 17.5 
4- 1-2 
49 
3. 15 p. m. 
724. 7 
718. 9 
707. 9 
— 4.3 
+ 1.5 
4-12. 5 
40 
2. 15 p. m. 
928.3 
906. 3 
899. 1 
— 10.9 
+ 11.4 
4-18.6 
34 
1. 20 p. m. 
1078. 6 
1064. 7 
1046. 8 
— 22.8 
— 8.9 
4-9.0 
27 
0. 30 p. m. 
1189. 0 
1175. 7 
1157. 2 
— 30.4 
— 17. 1 
4- 1-4 
22 
12. 00 m. 
1271. 0 
1251. 1 
1248.4 
— 10.2 
4- 9.7 
4-12.4 
18 
11. 00 a. m. 
1420. 0 
1407. 8 
1396. 9 
— 43.0 
— 20.8' 
— 9.9 
14 
10. 00 a. m. 
1473. 0 
1455. 9 
1463. 3 
— 6.4 
4- 10.7 
4-3.3 
7 
9. 00 a. m. 
1621. 3 
1596. 7 
1623. 3 
+ 6.7 
4- 31.3 
4- 4.7 
Sept. 
30 
1 
7. 40 a. m. 
1783. 6 
1755. 5 
1781. 6 
— 9.2 
— 11. 1 
— 6.7 
3 
8. 00 a. m. 
1818. 0 
1788. 5 
1815. 1 
— 8.3 
4- 21. 2 
— 5.4 
6 
8. 20 a. m. 
1867.8 
1844. 9 
1861.8 
+ 6.2 
-f 29.1 
-f-12.2 
* 
9 
8. 45 a. in. 
1935.4 
1914. 3 
1928. 1 
— 4.3 
4- 16.8 
4-3.0 
10 
9. 00 a. m. 
1970. 6 
1946. 7 
1964. 5 
— 2.9 
21. 0 
4- 3.2 
12 
10. 00 a in. 
2032.9 
2054. 3 
2049. 5 
+ 12. 1 
— 9.3 
— 4. 9 
15 
11. 05 a. m. 
2138. 3 
2168. 3 
2157.4 
4- 21.7 
— 8.3 
4-2.6 
18 
1. 25 p. m. 
2440. 6 
2389. 7 
2370. 3 
— 68. 1 
— 17.2 
-f- 2. 2 
22 
2. 30 p. m. 
2673. 8 
2541.4 
2601. 2 
— 55. 2 
4- 77.8 
4-17.4 
27 
3. 15 p. m. 
2870.1 
2828. 0 
2810. 6 
— 60. 6 
— 18.5 
— 1.1 
Oct. 
1 
31 
10. 30 a. m. 
2798. 1 
2767. 1 
2762. 9 
— 40. 1 
— 9. 1 
— 4. 9 
33 
11. 40 a m. 
2463.4 
2399. 5 
2403. 3 
— 28.2 
-f 35.7 
4-31. 9 
38 
1. 10 a. m. 
2308. 8 
2277. 0 
2273. 2 
— 28. 6 
4- 3.2 
4-7.0 
40 
3. 00 p. in. 
2144. 5 
2013. 1 
2102. 5 
— 13. 1 
4- 18.3 
4-28. 9 
45 
4. 30 p. m. 
2066. 6 
2049. 8 
2067. 6 
+ 1.8 
4- 18.6 
4-0.8 
Oct. 
2 
47 
10. 15 a. m. 
2165. 5 
2187. 0 
2175. 9 
-f- 6.5 
— 15. 0 
— 3. 9 
51 
11. 00 a. m. 
2024. 7 
2012. 4 
1998.4 
— 22.0 
' — 9.7 
4-4.3 
