Chemistry and Physics. 385 
be sustained, and the lip sp alerts! gave he Suds before 
the expiratory power of the thoracie muscles was exhausted. 
second experiment beers in introducing a sal eon tube 
into the angle of the mouth, connected with a flexible tube pass- 
ing over the shoulder. It was found that most instruments 
could be played as well with this addition as without it. It ob- 
viously established a communication between the cavity of the 
performer’s mouth, and therefore of his thorax, and the pressure 
was co a 
cession the chief notes of his instrument. As soon as the tone 
became full and steady, the position of the water gange was noted. 
A fair “ mezzo-forte ” note was employed. Of course, by forcin 
the wind and overbowing the instrument, 4. tanith greater pres- 
d 
eerie se notes, 9 inches, highest, 2 inches. 
15 
Clari 
Besar, es Ay pep en wz oF . 
: (<4 5 (<4 [<4 7) 4 “ 
Cornet, a i Bee ree . | gs 
EN aoe = 12.5 sf be 
Euph “ 3 “ “ 40 “ 
Sonia i Re - aS 
It will be noticed that the clarinet in this, as in some other 
respects, differs from its kindred instruments, ‘and also that most 
effects are the results of evaporation and condensation, and that 
they are valuable evidence of the truth of the kinetic theory of 
gases, viz., th si gas consists of separate molecules, moving at 
was attracted, but after a short time the moisture condensed on it 
