108 Mr. Goldingham’s experiments 
its motion. The French academicians indeed proved, as I 
have mentioned before, that this made no difference in the 
velocity. 
I shall now proceed to the conclusions from the other 
Tables ; and first, those of the experiments with the Mount 
gun. 
Baro- 
Thermo- 
Hygro- 
Wind. 
Seconds. 
Distance. 
Velocity 
meter 
meter. 
meter. 
in a second. 
Table 
Inches. 
O 
O 
Feet. 
Feet. 
II. 
29,990 
83,95 
20,31 
Calm 
25,712 
29,547 
1 149,2 
III. 
29,972 
85 , 5 
19,96 
SE 
25,754 
1147,2 
IV. 
30,113 
81 , 7 
10 , 9 
NE 
26,812 
1 102,0 
V. 
29,934 
85 , 1 
2 6 , 
SW.W.&NW 
25,374 
1 164,4 
Secondly. The 
i experi 
ments with the Fort gun. 
Table 
VII. 
30,111 
79, 3 
11,85 
Calm 
12,313 
13932,3 
1131,5 
VIII. 
30,023 
82 , 3 
14 , 6 
SE 
12,231 
1139,1 
IX. 
30,131 
78, 6 
7,33 
NE 
12,340 
1129,0 
X 
29,979 
81 , 9 
11,41 
SW.W.&NW 
12 , 46 
lll8,l 
The results in these Tables, like the separate observations, 
show the necessity of making a series of experiments long 
continued, in order to obtain the correct general rate at which 
sound travels ; and this may afford a clue, as I observed in 
the first part of this paper, for discovering the cause of the 
differences in the results by the authorities there named : it 
is difficult, undoubtedly, to ascertain the distance of two sta- 
tions, one far from the other, to the nearest foot ; but errors 
of many feet in this respect, would make but a small differ- 
ence in the velocity in a second found by experiment, when 
