[A9]

Man

A pipe closed at one end to prevent food falling in & with air forced through it by the bellows of the lungs, might easily incidentally give rise to some sound & if this found of any benefit it might be modified or intensified to any beneficial extent. In same manner as the creaking of the head armor of Beetles has been connected with stridulatory organs; & air driven out of the spiracles of the Homoptera with musical instruments. We may suspect from the part which voice plays in the Amphibians, to lowest animals, which

[A9v]

use their voice as the vertebrate that voice was first intended & modified for sexual purposes ie. as a call or charm & all the facts given in the higher classes of Birds & insects, certainly support the view that this was the primordial use of the voice, they have put to so many uses & as the case of man has great distinction mark & man of wonderful progress.