Of Winds and Sounds.

^nd various Coincidences, strike the Ear^ once, yet with Distinctness and agree-Consonance.

Vl. ss/je 'Particles of Air, and consequentlyPulses, striking against an Obstacle , willr estisied back under an Angle equal to that

°f

the

Le

The Honourable Mr. Roberts ,The Honourable Mr. Boyle,Mr. Walker, '

•Mersertnus ,

The Academy at Florence,Royal Academy at Paris,

Sir Isaac Newton, Flamjiead,

^ Halley, and Derham,

Feet per Second.' 1300, 1200

*338

1474

1148

1172

1142

.9- As no Man ever had a better Opportunity, socould improve it with greater Diligence, Assiduity,{J* Accuracy, in determining and settling the variousk ^nomena of Sounds, than the so often celebrated‘lofopher last mentioned. He proved by Experiments{j “ e by the Strokes of a Hammer, and the Explo-of a Gun at the fame time, at the Distance of athat the Velocity of Sounds produced from dif-f, ren t Bodies was the fame, or came to his Ear in the^ Time.

so/ 0 ' ^bat the Motion of Sound was equable and uni-’se 'r ° r t ^ at '*• P a Ts’d through Spaces proportional tot[j £* mes ’ be found by various Experiments made byExplosion of Guns at different Distances, as ap-hy the following Table which he has given us :q uere the first Column shews the Places at which the0 f Uns were fired ; the second the Number of Vibrationsvs an Half-Second Pendulum ; the third the Distanceby ^ Places in Miles and decimal Parts, as measuredby / r 'g°nometry ; the fourth the Distances measuredop le ^elogity of Sound, admitting it to be at the Rate°ne Mile every g|- Half-Seconds.

257

At-