A. M. Mayer—Researches in Acoustics. 91 
secondly, the minuteness of such a membrane would render it 
impossible to co-vibrate with those sounds which generally 
occur in nature, and which the insects themselves can produce ; 
condition. Finally, the hard test, characteristic of the articu- 
lates, sets aside the idea that they receive the aerial vibrations 
a 
} 
= 
ie le} 
SS 
et 
oe 
ia?) 
© 
2) 
= 
@ 
RS 
=| 
og 
ce) 
Loma] 
co 
oo 
@ 
-~ 
op 
4) 
fA 
foes 
a 
ia) 
Eh 
n 
oS 
a") 
a 
4 
si 
o 
® 
2) 
Qu 
— 
7 
the organ of hearing in insects, have rarely kept in view the 
anatomist of former years could be satisfied with his artistic 
ment of nature; for the perusal of those long and labor 
precise descriptions of forms of organs without the slightest 
* See section 4 of this paper. 
