1825.] 



Velocity/ of Sound. 



281 



artillerymen enabled us to have the guns fired within the interval 

 of one second. 



A Table showing the Results of Experiments on the Velocity of 

 Sound as observed by different Philosophers. 



' 1 . Mersenne de Arte Ballistica, Prop. 39. 



2. Tentamina Experim. Acad, del Cimento, L. B. 1738, Part II. p. 1 16. 

 • 3. PhUos. Trans. 1698, No. 247. 



4. Duhamel, Hist. Acad. Reg. L. II. Sect. 3, Cap. II. 



5. PhUos. Trans. 1708 and 1709. 



6. Ibid. ibid. 



7. Mem. del'Academie des Sciences, 1738 and 1739. 



8. Comment. Bononienses, vol. ii. p. 365. 



9. La Condamine Introduction Historique, &c. 1751, p. 98. 



10. Mem. de I'Acad. Royale des Sciences, 1745, p. 488. 



11. J. T. Mayer, Praktische G^ometrie Gottingen, 1792, B. 1, p. 166. 



12. Muller, Getting. Gelehrt. Anzeige, 1791, St. 159 et Voigts Magazin, &C.B.8, 

 St. l,p. 170. 



13. Annales de Chimie et de Phys. t. vii. p. 93. 



14. Gilbert's Annalen, neue Folge, B. v, p. 383. 



15. Connoissance des Terns. 1825, p. 361. 



Article VIII. 

 On Copper Sheathing. 



We copy the following answer to an article which appeared, 

 it seems, in the Plymouth Journal a short, time since, from the 

 Devonport Telegraph of Sept. 3 : — 



Sir H. Davy's Protectors. 



*'■ We cannot descend to personaUties with the Plymouth 

 Journal and its vulgar auxiliaries — a style of writing which we 

 thought had departed with its former editor. We repeat our 



