|
Dulong calculated that the velocities of sound through the following gases at the temperature of 0 Centigrade are :-
| Feet per Second. |
| Air |
1,092 |
| Oxygen |
1,040 |
| Hydrogen |
4,164 |
| Carbonic Acid |
858 |
The velocities through liquids, according to Wertheim, are:-
|
Temperature.
Centigrade. |
Feet per
second. |
| River-water (Seine) |
15c |
4,741 |
| Solution of Common Salt |
18c |
5,132 |
| Common Alcohol |
20c |
4,218 |
| Solution Chloride of calcium |
23c |
6,493 |
The same authority gives the velocity of sound through solids at the following rates:-
|
20 Centigrade
Feet per Second. |
100 Centigrade
Feet per Second. |
200 Centigrade
Feet per Second. |
| Lead |
4,030 |
3,951 |
- |
| Gold |
51,717 |
5,640 |
5,619 |
| Iron |
16,822 |
17,386 |
15,483 |
WOOD.
| |
Along Fibre: |
Across Rings: |
Along Rings: |
| Acacia |
15,467 |
4,840 |
4,436 |
| Fir |
15,218 |
4,382 |
2,572 |
| Beech |
10,965 |
6,028 |
4,643 |
| Oak |
12,662 |
5,036 |
4,229 |
| Pine |
10,900 |
4,611 |
2,605 |
| Elm |
14,639 |
4,916 |
3,728 |
| Sycamore |
15,314 |
4,567 |
4,142 |
| Ash |
16,677 |
5,297 |
2,987 |
| Elder |
15,306 |
4,491 |
3,423 |
| Aspen |
16,677 |
5,297 |
2,987 |
| Maple |
14,472 |
5,047 |
3,401 |
| Poplar |
14,052 |
4,600 |
3,444 |
Taken from:
Brinsmead. E. The History of the Piano, Simpkin Marshall & Co 1889
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