Of Winds and Sounds.

^ 1 - All the Pulses , ■:whether denser or rarer ,f> ^ Ue with equal Velocities: This Sir Isaacffton has demonstrated a priori, and al-j, that this Velocity is at the rate of 1142eet in one Second of Time; which mostagrees with the repeated and mostCu tate Experiments pf the late ReverendPier ham. The Velocity of Sound is

iv

^efore near thirteen times as great as*t of the strongest Wind: And since ita. t necessarily increase with the Air’s Ela-

S.

it will be greatest in Summer, eri the Air is most heated, and vice versa^the Winter : Also, as the Motion of theconspires with, or is contrary to^ °f Sound, thp Velocity of Sound will,[j,. lri some small Degree augmented or di-jj.'^siied thereby, though not discernibleExperiments.

The Interval or Distance of thei^Pes s rom eac h other is the fame among alljiiT Q re exciied by the fame Stroke: ForCe each Pulse is caused by a single Vi-^

bration

th^°’ or Miles; But Dr. Hearn , Physicianhing of Sweden , tells us, that at the Bombard-.Aolmia, A. D. 165B, the Sound was heard toV s ^nce of 30 Swedijb Miles, which make 180 off i ) * n hie Fight between England and Holland,y«/ e ‘ I ^ 7 2 , the Noise of the Guns was heard even in5 Which cannot be less than 200 Miles.

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