274 I)R. LOUIS VESSOT KING ON THE PROPAGATION OF SOUND IN THE FREE 
Table 3. —Long Range Acoustic Survey, August 26, 1913. 
Father Point Meteorological Observations. 
Barometer, 30 '00. Air temperature : dry bulb, 50° F.; wet bulb, 40° F. 
Wind: variable in direction during observations. Velocity: 8-9 a.m. (Position Nos. 0-10), 5 miles per hour from W. ; 
9- 10 a.ui. (Position Nos. 10-69), velocity 7 miles per hour to commence with : wind \eers by S. and N. to wind from E.; 
10- 11 a.m. (Position Nos. 69-89), velocity 10 miles per hour from E. 
Weather : cloudy; clouds almost stationary. Sky 80 per cent, overcast. 
Phonometeb Readings. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
]S T o. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
1 
19 
2 '9 
37 
0 '3 
55 
73 
0'6 
2 
— 
20 
4'8 
38 
0 '1 
56 
— 
74 
0'7 
3 
0'3 
21 
3'2 
39 
0'1 
57 
— 
75 
0'5 
4 
0'3 
22 
3'4 
40 
O'O 
58 
— 
76 
0'3 
5 
0 '4 
23 
5 '0 
41 
O'O 
59 
0 -o 
77 
O'O 
6 
0 '5 
24 
4'2 
42 
0'2 
60 
0 '3 
78 
0 -o 
7 
0'7 
25 
5 '2 
43 
O'O 
61 
0'3 
79 
0'2 
8 
0 '4 
26 
4 "0 
44 
0'3 
62 
0'1 
80 
O'O 
9 
0'3 
27 
3 '8 
45 
0 '0 
63 
0'1 
81 
O'O 
10 
0 '5 
28 
3 '5 
46 
o -o 
64 
0'3 
82 
0-0 
11 
0 '7 
29 
1 '0 
47 
0'2 
65 
0 '3 
83 
0 '2 
12 
1 '2 
30 
0'.3 
48 
0'2 
66 
0'2 
84 
0'3 
13 
1 '2 
31 
0'2 
49 
0'2 
67 
0'2 
85 
0 -45 
14 
0 '6 
32 
0'7 
50 
0 '1 
68 
0'3 
86 
0'9 
15 
0 '6 
33 
1 1 
51 
o-o 
69 
0'2 
87 
1 '8 
16 
1 '5 
34 
0'3 
52 
0 0 
70 
0'3 
88 
2'6 
17 
1 '4 
35 
0 '2 
53 
— 
71 
0'4 
89 
5'0 
18 
2 '3 
36 
0'4 
54 
— 
72 
0'3 
Remarks. 
8 . 44 a.m. Left Rimouski wharf. 
1. Signal first heard. 11. Air temperature, 50° F. 19. Ship just off Father Point wharf. 25. Time, 9.15 a.m. Course 
set outwards from fog-signal station. 41. Signal audible. 53-56. Escape steam blowing off : signals not heard. 57. Time, 
9.47 a.m. Ship turned on course back to Father Point. 63. Air temperature, 51° F. 77. Signal just audible. Air 
temperature, 52° F. 89. Time, 10. 10 a.m. Ship opposite Father Point wharf. 
