45 ' 6 
Dr. Moll’s account of the experiments , &c. 
A Table showing the results of experiments on the velocity of 
sound as observed by different philosophers. 
Names of Observers. 
Time when 
made. 
Country where 
made. 
Length of basis, 
metres. 
Velocity of Sound per 
Second in metres. 
Mersenne 
France 
448 
1 
Florentine Philosophers 
1660 
Italy 
1800 
361 
2 
Walker 
1698 
England 
800 
39 8 
3 
Cassini, Huigens, Sec. 
France 
2105 
35 * 
4 
Flamsteed and Halley 
England 
5000 
34 S 
5 
Derham 
1704& 1701; 
England 
1600 a 2000 
348 
6 
French Academians 
1738 
France 
22q\t, Sc 281526 
332,93 at o° c 
7 
Blanconi 
1740 
Italy 
24000 
3*8 
8 
La Condamine 
1740 
Quito 
2 °S 43 
339 
9 
La Condamine 
1744 
Cayenne 
394 z 9 
358 
10 
T. F. Mayer 
1778 
Germany 
1040 
336,86 
11 
G. E. Muller 
1 79 1 
Germany 
2600 
338 
12 
Epinoza and Banza 
1794 
Chili 
1634S 
356,14 at o° 
13 
Benzenberg 
1809 
Germany 
9072 
333,07 at o° 
14 
Arago, Mathieu Prony 
1822 
France 
18612 
331,05 at o° 
1 5 
Moll, Van Beek, and j 
Kuytenbrouwer j 
1823 
Netherlands 
17669,28 
S 332,05 at o° } 
| and dry air. 5 
16 
i. Mersenne de Arte Ballistica Prop. 39. 
3. Tentamina Experim. Acad. del. Cimento, L. B. 1738, Part II. p. n6« 
3. Philos. Trans. 1698, No. 247. 
4. Duhamel, Hist. Acad. Reg. L. II. Sect. 3, Cap. II. 
5. Philos. Trans. 1708 and 1709, 
6. Ibid, ibid. 
7. Mem. de l’Academie des Sciences, 1738 and 1739. 
8. Comment. Bononienses, Vol. II. p. 365. 
9. La Con da mine Introduction Historique, Sec. 1751, p. 98. 
10. Mem. de 1 ’Acad Royale des Sciences, 1745, p. 488. 
11. J. T. Mayer, Praktische Geometrie Gottingen, 1792, B. 1. p. 166. 
jz. Muller, Gotting. Gelehrt. Anzeige, 1791, St. 159 & Voigts Magazin, Sec, 
B. 8, St. 1. p. 1 70. 
13. Annales de Chimie. et de Phys. T. VII. p. 93. 
14. Gilbert’s Annalen, neue Folge, B. V. p. 383. 
15. Connaissance des Terns. 1825, P- 361, 
Communicated by Captain H. Kater, F, R . S, 
