i:.4 rUOCKFAMN-O^ OF TUK AMKIUO.VX ACMHIMY 



iu it., uu^^itv, *ud knv iu pitch, but still quito jvrwpiible. With this 

 tulv -i ohHxi> in tho dir^vtiou of the ourrv^ut did uot att'ect the note 

 prvxliKwl. \ did uot obtain this musicil note from aiiy tube that 

 I possess if. >vhioh the ourmu enters and leaves by a straight wir^, 

 except in the o^se of one Geissler s tul>e exhaustevl so as to give 

 stratido*tious, iu which it \^-as very feebly heard. 



