174 
THE VOYAGE OF H.M.S. CHALLENGER. 
Group T r . — 2 experiments at 1 0, 2 and l°-8. X for 1°'5 = 23'18. 
Group VI . — 2 experiments at 5‘ '8 and 6°*5. X for 6°-0 = 20"20. 
Group VII . — 2 experiments at 33°G and 33°'3, taken as one experiment made at 
33 45. X for 33°*5 = 12"80. These mean X’s were treated according to the method of 
h ast squares, the following number of votes being allowed to the several groups : — 
Votes, 
Groups T. and II. 
4 
III. and IV. 
3 
V. 
1 
The resulting formula was — 
lOOOXj = 
927-31 
3902 + J 
VI. 
1 
VII. 
By giving one vote to each group I arrived at the formula — 
1000X 2 = 
924-71 
38-90 + 1 
t. 
X,. 
K 
A. Observed. 
14* 
17-49 
17-48 
17-42 
19* 
15-98 
15-97 
16-10 
l*-5 
22-89 
22-89 
23-18 
6*-0 
20-60 
20-59 
20-20 
33*-5 
12-79 
12-77 
12-80 
I adopted the formula — 
1000X = 
92731 
3900 + 1 
and by means of it calculated the subjoined tables. 
Values for Wj. 
1 h<- mean temperatures and mean values of / n l for the several groups were as follows : — 
im 
100 n,- 
1 4 * 
33 98 
20 ° 
33-78 
18° 
33-58 
0 ° 
34-37 
6 ° 
34-18 
33° 
33-29 
Rectilinear graphic interpolation led to the formula — 
100 x w, = 34-40 — 0-031M, 
w hi« h was utilised for calculating the values in Table IX. 
