272 DR. LOUIS YESSOT KING ON THE PROPAGATION OF SOUND IN THE FREE 
Line V. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
1 
6 '4 3 
7 
3 6 
13 
1 -o 
19 
3 '6 
25 
6 '8 
2 
6'4 5 
8 
3 '0 
14 
0 7 
20 
3 '4 
26 
9 T 
3 
7'7 
9 
2 '3 
15 
0 '85 
21 
3'65 
27 
3 '8 
4 
7'4 
10 
2 '7 
16 
0 '65 
22 
3 '35 
28 
7 '5 
5 
5 2 
11 
1 '8 
17 
0 '85 
23 
4 '3 
6 
3 '4 
12 
0 6 
18 
1 '45 
24 
6 '2 
Remarks. 
Readings plotted on Charts 1 and 2. Wind, 2 miles per hour from W. 
14. Most distant station, about 700 feet. Time, 3.43 p.m. Reading at end of Rather Point wharf, 4 •2. 
Table 2.— Short Range Acoustic Survey, September 4 and 5, 1913. 
Father Point Meteorological Observations, September 4. 
Barometer, 30 '21. Air temperature : dry bulb, 47° F.; wet bulb, 43° P. 
Wind : steady; 3-4 p.m., velocity 7 miles per hour from W.; 4-5 p.m., velocity 7 miles per hour from W. 
Weather, clear. Sky unclouded during observations. 
Phonometer Readings. 
Line VII. September.4. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
j Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
1 
2'5 
6 
0'6 
11 
0'2 
16 
0'3 
21 
1 T 
2 
1 '4 
7 
0 '4 
12 
0'4 
17 
0'6 
22 
3 *5 
3 
1-0 
8 
0'4 
13 
0'3 
18 
0'7 
23 
4'2 
4 
0'8 
9 
0-2 
14 
0 '4 
1 !) 
1 '8 
24 
5 *0 
5 
0'8 
10 
0 '2 
15 
0-3 
20 
1 '0 
Remarks. 
Readings plotted on Chart 2. Wind, 7 miles per hour from W. Sea smooth. 
1. Time, 3 '45 p.m. Boat close to end of Father Point wharf. 10. Turned back along same line. 22. Boat close to end 
of Father Point wharf. 
Line I. September 4. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
Position 
No. 
Phono¬ 
meter. 
1 
>20 
12 
3'5 
23 
L 5 
34 
3'5 
45 
5 *5 
2 
17'0 
13 
3'8 
24 
1 '3 
35 
2 '3 
46 
5 *5 
3 
15 '0 
14 
5 '3 
25 
2'3 
36 
1 '5 
47 
6'5 
4 
10'0 
15 
4'3 
26 
1 '8 
37 
1 *5 
48 
5'0 
5 
9'0 
16 
2'8 
27 
2'3 
38 
1-6 
49 
6'0 
6 
8 '0 
17 
3 '0 
28 
3'3 
39 
2'0 
50 
7 0 
7 
10 '0 
18 
1 '5 
29 
1 '0 
40 
3'5 
51 
7 '5 
8 
8'2 
19 
1 *5 
30 
3 T 
41 
3 '0 
52 
7 '3 
9 
5 0 
20 
1 '5 
31 
2'0 
42 
3-0 
53 
8'5 
10 
5 '0 
21 
1 *5 
32 
3 *5 
43 
3'8 
54 
9'3 
11 
5 ‘0 
22 
1 '4 
33 
3'0 
44 
4'3 
55 
8'0 
Remarks. 
Readings plotted on Chart 2. Wind, 7 miles per horn' from W. Sea smooth. 
1. Time, 4.18 p.m. Reading off scale. 29. Turned back along same line. 
Control station .—Phonometer reading, 5 '0. 
Mean air-pressure operating diaphone, 19 '9 lbs. per sq. inch above atmospheric. 
