ON  THE  PEAK  OP  TENEEIPPE. 
519 
conclusion  we  have  since  ascertained  to  be  remarkably  borne  out  by  the  “peripatetic” 
observations  on  September  the  8th.  For,  ascending  the  Peak  on  that  day,  and  passing 
through  a locality  where  there  was  a visible  escape  of  volcanic  steam,  and  a sensible' 
increase  of  the  temperature  of  the  air,  our  observations  show  that  a barometrical  hum]) 
was  thereby  produced  on  the  side  of  the  mountain  to  the  extent  of  368  feet. 
The  formula  employed  was  that  of  La  Place,  as  adapted  to  practice  by  Feancis  Baily 
in  his  Astronomical  Tables. 
Hourly  Variation  of  Heights. 
The  folloAving  two  Tables  will  show  the  manner  of  variation  of  the  computed  heights 
with  change  of  the  several  meteorological  conditions,  one  of  the  tables  being  also 
exhibited  graphically  in  Plate  XXXVI. 
Guajara  Station. 
Date. 
Hour. 
Corrected 
barometer, 
at  sea-level. 
Thermo- 
meter. 
Depression 
of 
dew-point. 
Barometer, 
corrected 
on 
mountain. 
Thermo- 
meter. 
Depression 
of 
dew-point. 
Altitude 
above 
sea-level. 
Radiation  1 
at  j 
Guajara.  ! 
1856. 
in. 
in. 
feet. 
O 1 
Aug  1. 
4 A.M. 
30-031 
67-8 
i 
6 A.M. 
30-052 
69-7 
6-3 
21-955 
57-5 
37-3 
8814-6 
1 
1 
7 A.M. 
30-046 
70-0 
5-6 
21-952 
58-6 
36-8 
8830-0 
+ 
52-4 
8 A.M. 
30-043 
71-8 
7-8 
21-975 
60-0 
39-2 
8826-2 
+ 
66-7 
9 A.M. 
30-055 
72-6 
8-7 
21-992 
61-9 
39-9 
8840-8 
+ 
77-4 
10  A.M. 
30-061 
71-5 
7-3 
22-000 
64-0 
38-6 
8844-5 
+ 
82-8 
1 1 A.M. 
30-053 
71-7 
7-9 
21-998 
66-3 
41-5 
8863-0 
+ 
82-7 
0 P.M. 
30-044 
74-0 
10-2 
21-995 
66-7 
40-4 
8883-0 
+ 
101-6 
1 P.M. 
30-032 
75-8 
12-0 
21-975 
66-4 
42-2 
8910-7 
+ 
85-8 
1 
2 P.M. 
30-023 
75-1 
10-4 
21-978 
66-5 
41-5 
8892-7 
4- 
82-3 
1 
3 P.M. 
30-019 
73-8 
9-2 
21-966 
66-7 
41-3 
8894-9 
+ 
74-9 
4 P.M. 
29-995 
73-8 
9-2 
21-960 
65-5 
40-5 
8869-0 
+ 
73-0 
5 P.M. 
29-991 
74-3 
10-0 
21-946 
62-4 
38-8 
8860-8 
62-4 
6 P.M. 
29-996 
74-8 
10-0 
21-958 
60-5 
35-7 
8835-9 
+ 
62-0 
7 P.M. 
30-003 
72-6 
8-2 
21-961 
58-4 
35-4 
8799-4 
+ 
2-5 
1 
8 P.M. 
30-015 
71-0 
5-7 
21-968 
57*3 
36-9 
8777-5 
— 
4-5 
1 
1 
9 P.M. 
30-024 
70-8 
5-4 
21-972 
55-5 
35-4 
8762-6 
— 
4-2 
1 
10  P.M. 
30-031 
70-3 
4*6 
21-966 
55-9 
32-1 
8775-7 
— 
4-1 
1 
1 1 P..M. 
30-027 
70-0 
4-9 
21-968 
55-3 
27-4 
8761-0 
— 
4-3 
1 
0 A.M. 
30-018 
69-8 
4-6 
21-956 
54-3 
27-9 
8757-5 
— 
4-1 
1 A.M. 
29-999 
69-0 
5-0 
21-935 
53-8 
26-6 
8753-1 
— 
3-8 
2 A.M. 
29-994 
68-3 
4-0 
21-931 
53-9 
26-1 
8748-9 
— 
4-4 
3 A.M. 
29-983 
68-3 
4-0 
21-923 
53-3 
24-8 
8744-2 
— 
3-9 
1 
4 A.M. 
29-986 
67-8 
3-9 
21-919 
52-6 
23-0 
8741-0 
— 
3-0 
1 
5 A.M. 
29-985 
67-8 
4-9 
21-918 
52-7 
22-3 
8742-0 
— 
2-4 
1 
6 A.M. 
30-008 
68-3 
4-9 
21-918 
53-5 
23-6 
8757-3 
+ 
26-8 
1 
Mean 
8843-45 
i 
3 z 
.\[ncccLviii. 
