520 
THE  ADMIRALTY  ASTRONOMICAL  EXPEROIENT 
Alta  Vista. 
Date. 
Hour. 
At  sea-level. 
On  mountain. 
Altitude 
above 
sea-level. 
Barometer, 
corrected. 
Thermo- 
meter. 
Depression 
of  j 
dew-point.  | 
Barometer, 
corrected. 
Thermo- 
meter. 
Depression 
of 
dew-point 
1856. 
in. 
in. 
C 
feet. 
Aug.  21. 
4 
A.M. 
30-034 
71-8 
6 
A.M. 
30-095 
71-8 
7-8 
20-541 
48-7 
18-5 
10653-9 
7 
A.M. 
30-103 
73-3 
9-3 
21-0 
8 
A.M. 
30-108 
73-8 
10-0 
20-577 
54-4 
24-2 
10702-7 
9 
A.M. 
30-132 
74-4 
9-8 
20-594 
58-9 
31-4 
10758-5 
10 
A.M. 
30-134 
75-6 
10-4 
20-590 
62-6 
36-8 
10820-4 
11 
A.M. 
30-132 
77-1 
11-1 
20-592 
66-0 
37-2 
10869-1 
0 
P.M. 
30-109 
77-1 
11-1 
20-589 
65-2 
41-0 
10843-6 
1 
P.M. 
30-099 
76-3 
10-1 
20-587 
65-5 
39-1 
10831-6 
2 
P.M. 
30-101 
76-0 
11-3 
20-588 
63-4 
36-4 
10805-2 
3 
P.M. 
30-092 
74-8 
10-0 
20-591 
61-4 
34-6 
10757-0 
4 
P.M. 
30-089 
75-8 
13-2 
20-602 
58-4 
29-6 
10717-2 
5 
P.M. 
30-114 
74-6 
10-8 
20-607 
56-3 
26-5 
10697-5 
6 
P.M. 
30-125 
74-3 
10-3 
20-610 
54-7 
23-1 
10682-5 
7 
P.M. 
30-139 
73-8 
11-0 
20-613 
53-3 
21-7 
10670-7 
8 
P.M. 
30-155 
73-6 
9-8 
1 20-621 
52-3 
22-4 
10661-4 
9 
P.M. 
30-167 
73-8 
9-9 
20-619 
51-2 
19-8 
10665-0 
10 
P.M. 
30-173 
73-8 
9-6 
20-618 
51-8 
18-8 
10678-8 
11 
P.M. 
30-158 
73-6 
10-6 
i 20-614 
48-8 
19-1 
10634-6 
0 
A.M. 
9-9 
1 
A.M. 
30-130 
73-0 
8-8 
20-595 
48-4 
19-2 
10623-6 
2 
A.M. 
3 
A.M. 
i 
4 
A.M. 
30-104 
72-1 
8-2 
s 20-591 
49-1 
21-1 
10602-1 
5 
A.M, 
30-105 
71-6 
8-5 
! 20-595 
48-6 
19-2 
10587-2 
6 
A.M. 
30-125 
71-8 
8-8 
i 20-598 
49-3 
19-1 
10586-0 
Mean 
. IO707-O8 
Daily  Variations  of  Heights. 
From  the  daily  means  already  given  for  each  of  the  three  stations,  the  compi 
height  of  Guajara  varies  thus : — 
Date. 
Feet. 
Date. 
Feet. 
Date. 
Feet. 
Date. 
Feet. 
July  21. 
8793-3 
July  28. 
8950-4 
Aug.  5. 
8961-7 
Aug.  1 2. 
8899-8 
22. 
8913-6 
29. 
8868-3 
6. 
8897-0 
13. 
8848-8 
23. 
8988-0 
30. 
8810-3 
7. 
8916-0 
14. 
8807-9 
24. 
9005-6 
Aug.  1. 
8821-3 
8. 
8931-8 
1 5. 
8776-3 
25. 
8993-6 
2. 
8845-9 
9. 
8942-4 
16. 
8822-1 
26. 
8974-5 
3. 
8930-0 
10. 
8902-9 
17. 
8913-0 
27. 
8966-5 
4. 
8982-6 
11. 
8917-7 
and  that  of  Alta  Vista  as  follows : — 
Date. 
Feet. 
Date. 
Feet. 
; Date. 
Feet. 
Date. 
Feet. 
Aug.  21. 
10,688 
Sept.  2. 
10,715 
i Sept.  8. 
10,666 
Sept.  14. 
10,674 
22. 
10,691 
3. 
10,731 
9. 
10,656 
15. 
10,597 
2.3. 
10,687 
4. 
10,768 
11. 
10,708 
16. 
10,617 
24. 
10,689 
5. 
10,754 
12. 
10,747 
17. 
10,562 
Sept.  1. 
10,704 
6. 
10,720 
13. 
1 0,758 
