1020 
THE VOYAGE OF H.M.S, CHALLENGER. 
TABLE I. — Abstract of the daily rates of the Chronometers used for calculating Meridian Distances in 1 l.S 
on different days at the same obsen g 
Places where rated. 
Date. 
Number 
of days 
rates. 
Mean Temp, 
in 
Chronometer 
Boom 
RATES OF THE Cl 
luring rating 
period. 
Z 
A 
B 
c 
D 
E 
F 
Portsmouth. 
20/12/72 
11 
53° -0 
s. 
-3-400 
5. 
-0-900 
s. 
+ 9-610 
- 3-964 
s. 
+ 6-220 
+0*400 
s. 
- 7 * 01 ; 
Lisbon. 
12/ 1/73 
8 
60° '0 
-3-008 
-4-640 
+12-760 
-3-770 
+6-236 
+ 1-140 
-8-94( 
Gibraltar. 
25/ 1/73 
7 
60°-5 
-2-956 
-5-206 
+ 14-760 
-3-384 
+ 6-580 
+ 1-544 
-9 077 
Tenerife. 
14/ 2/73 
6 
64° '0 
-2-973 
- 6T40 
+17-527 
- 3-282 
+ 6-427 
+ 2-493 
-8-82S 
St. Thomas. 
24/ 3/73 
6 
77°'5 
-3-313 
- 7T47 
+ 24T12 
- 3-972 
+ 4-070 
+ 1-203 
- 10-74/ 
Bermuda. 
11/ 4/73 
6 
7 2° g 5 
-3-171 
-7-047 
+24-487 
-3-905 
+4-520 
+ 1-903 
- 9-788 
Do. 
19/ 4/73 
8 
69°-5 
-2-852 
-6-771 
+24-366 
- 3-740 
+ 4-366 
+2-729 
-9-35; 
Halifax. 
19/ 5/73 
9 
52° p 5 
-2-933 
-4-617 
+ 23-928 
-3-761 
+ 4-189 
+2-066 
- 6-7P 
Bermuda. 
12/ 6/73 
10 
76° -0 
-3-342 
-7-952 
+24-973 
- 4-142 
+ 5T13 
+ 1-868 
-9-78i 
St. Vincent. 
3/ 8/73 
6 
78° -0 
- 17-815 
-10-632 
+26-510 
-4-707 
+6-493 
+1-618 
- 10-13: 
Bahia. 
22/ 9/73 
6 
78° -0 
-21T98 
+26-952 
-5-048 
+ 7-360 
+ 1-901 
-9-53: 
Do. 
25/ 9/73 
9 
78°-0 
-21-421 
+ 26-951 
- 5T04 
+ 7 ‘551 
+1-807 
-9-54: 
Cape of Good Hope. 
7/11/73 
6 
64° -0 
-20-868 
+28T15 
- 4T01 
+ 8-032 
+ 3-257 
- 5-67 
Do. 
21/11/73 
14 
66° -0 
-20-666 
+ 27T87 
- 4-252 
+ 8-055 
+3-308 
-6T5 
Do. 
11/12/73 
8 
65° -0 
-20-537 
+27-775 
- 4-263 
+ 7-963 
+3-312 
-5-72 
Do. 
16/12/73 
5 
66° -0 
-20-908 
+ 27-462 
-4-218 
+ 7-802 
+3-282 
-6-09 
Elizabeth Harbour, Kerg. I. 
15/ 1/74 
5 
52° -0 
-19-382 
+ 27-358 
-3-942 
+ 7-438 
+2-678 
-6-24 
Christmas H arbour, Kerg.I. 
30/ 1/74 
23 
51° -0 
-19-455 
+ 27-499 
-4-026 
+ 7-358 
+ 1-238 
-6-06 
Melbourne. 
30/ 3/74 
12 
64°-0 
-20-986 
+ 28-431 
' -3-777 
+ 8-306 
+ 0-589 
-7-66 
Sydney. 
13/ 4/74 
6 
72° -0 
-22-507 
+ 28-718 
-4-332 
+ 8-027 
+0-510 
-8-76 
Do. 
11/ 5/74 
28 
69° -0 
-22-132 
+ 29-425 
-3-989 
+ 8-316 
+1-486 
-8-25 
Do. 
18/ 5/74 
7 
64° -0 
-22-133 
+ 29-710 
-3-526 
+8-367 
+ 1-588 
-7-29 
Do. 
1/ 6/74 
14 
62° -0 
-21-758 
+ 29-542 
- 3-465 
+ 8-374 
+ 1-788 
-7-21 
Do. 
8/ 6/74 
7 
60° -0 
- 21-100 
+29-628 
- 3-821 
+ 8-336 
+ 2-074 
-6-63 
Wellington. 
5/ 7/74 
6 
58° ’0 
-19-783 
+ 30-953 
-3-417 
+ 8-793 
+ 1-110 
-5-90 
Ngaloa Harbour. 
9/ 8/74 
13 
78° -0 
-23-929 
+29-863 
-4-272 
+ 8-409 
+ 4-352 
- 8-78 
Cape York. 
8/ 9/74 
1 1 5 | 
81° -0 
-25-634 
+ 30-426 
-5-214 
+ 7-926 
+ 3-086 
- 10-01 
Arrou Islands. 
22/ 9/74 
5 
83° -0 
-26-234 
+30-696 
- 5T04 
+ 7-836 
+ 3-436 
- 11T6 
Amboina. 
10/10/74 
5 
83° -0 
- 28T16 
+ 30-654 
-4-946 
+ 7-934 
+ 4-034 
- 11-72 
Manila. 
11/11/74 
6 
84° -0 
- 34T13 
+ 30-887 
-4-363 
+8'595 
+ 3-720 
-11-65 
Hong Kong. 
24/11/74 
7 
72° -0 
-32-796 
+ 32-193 
- 3T88 
+ 9147 
+ 5-340 
-7-84 
Do. 
5/12/74 
H 
67° -0 
-31-793 
+ 32-057 
-2-893 
+ 8-662 
+ 3-762 
-6-31 
Do. 
15/12/74 
10 
69° -0 
-31-871 
+ 31-139 
-3-096 
+ 8-629 
+ 4-689 
— 6-61' 
Do. 
27/12/74 
12 
72° -0 
-32T89 
+30-723 
-3-202 
+ 8-761 
+ 6-852 
-67* 
Do. 
4/ 1/75 
8 
64° ’5 
- 31T91 
+31-009 
- 2-529 
+ 8-959 
+ 1-327 
-6-3' 
Zebu. 
24/ 1/75 
5 
82° -0 
-35-236 
+ 30-454 
-3-596 
+ 8-494 
+3-054 
-975 
Saroboangan. 
5/ 2/75 
7 
82°-5 
- 35-110 
+ 31-226 
- 3-438 
+ 8-440 
+ 1-793 
-9-81 
Fares Harb. , Admiralty Is. 
10/ 3/75 
6' 
83°-5 
-37-345 
+ 31-938 
-3-395 
+ 7-988 
+ 1-205 
- 11-26 
Yokohama. 
18/ 4/75 
4 
62°-5 
-30-885 
+ 32-715 
-1-848 
+ 9-302 
+ 1-265 
- 6‘57 
Do. 
22/ 4/75 
4 
61°-0 
-30-818 
+ 32-482. 
-1-218 
+ 9-220 
+ 0-982 
-5-8i 
Do. 
4/ 5/75 
12 
61°-0 
-30-826 
+ 32-362 
-0-238 
+ 9-074 
+ 1-787 
5-5£ 
Do. 
7/ 6/75 
34 
69° -0 
-32-794 
+31-394 
-0-484 
+ 9-082 
+ 3-697 
-7-2/ 
Do. 
14/ 6/75 
7 
73°-5 
-33-941 
+ 32-637 
-1-834 
+ 9-258 
+2-687 
9-05 
Honolulu. 
' 4/ 8/75 
7 . 
80° '5 
-35-416 
+31-921 
-5-55 7 
+ 9-350 
+ 1-257 
- 10 - 8 ( 
Do. 
10/ 8/75 
6 
81°-5 
- 36-200 
+31-866 
-5-466 
+ 9-017 
+ 1-625 
10-4; 
Tahiti. 
1/10/75 
9 
80°-0 
- 34-117 
+ 32-078 
- 5T3P 
+ 9-384 
+1-628 , 
- 9-0! 
Valparaiso. 
27/11/75 
7 
67° "0 
- 33-011 
+ 33-060 
-3-490 
+ 9-060 
+ 1-724 
-5*7 ; 
Do. 
4/12/75 
7 
66°-0 
-32-393 
+ 32-844 
-2-570 
+ 9-287 
+2T16 
-5-3: 
Do. 
9/12/75 
5 
66° '0 
-32-038 
+ 33-152 
- 2T98 
+ 9-512 
+ 2-532 
- 4 - 8 ' 
Sandy Point. 
17/ 1/76 
3 
57°'5 
-31-983 
+ 33-242 
-2-673 
+ 9T27 
+ 1-877 
-5-3 
Port Stanley, Falkland Is. 
31/ 1/76 
6 
57°‘5 
-31-556 
+ 32-969 
-3-096 
+ 8-764 
+1-337 
-5-3 
Do. 
6/ 2/76 
6 
56° - 5 
-31-061 
+ 32-218 
-1-391 
+ 9-990 
+ 1-727 
- 4-4 
Monte Video. 
24/ 2/76 
8 
71°'0 
-33-689 
+ 33-217 
-3-657 
+ 9-292 
+2-305 
-6-5 
Ascension. 
2/ 4/76 
5 
83° -0 
- 37-088 
+ 33-092 
- 5-258 
+ 8-862 
+ 1-202 
-9-6 
j St. Vincent. 
25/ 4/76 
5 
75° -0 
-34-522 
+ 33-088 
- 4T82 
+ 11-078 
+1-518 
-7-5 t 
