respecting Sound and Light. 

 Table xi. 



123 



OPEN. 



STOPPED. 



A 



B 



C 



D 



E 



F 



M 



B 



C 



D 



E 



F 



4-3 





0.7 



8.8 



d* 



1 



4-5 





0.3 



1.8 



5 



1 





41 



8.8 







2 





1.2 

 5.0 



1-7 

 9P 



10.0 





3 

 5 



94 





0.3 



0.9 



7 



1 

















— 







0.8 





8.0 





2 



94 





0.2 



04 



/ 



1 





2.0 





18.0 





3 







045 



1.6' 





3 





5-o 



8.0 



20.0 





4 





1.1 



l.b* 



»-5 





5 





16.5 

 19.0 



18.0 



20.0 







5 

 6 





7.0 



8.0 







7 









16.1 





0.4 



0.6 



d* 



3 











— 





16.1 





0.4 



1.0 



g* 



2 





0.6' 



0.65 



1.1 





5 





0.8 



1.0 



2.2 





3 





°-9 



1.1 



2.4 





7 





1.2 



2.2 



4-7 





4 





1.6" 



2.4 



4-9 





9 





2.2 



47 



11.5 





5 





2.5 



4.8 



9.0 





1 1 





34 



4-° 





13-5 

 15.0 





6' 



7 





6\o 



7.0 







*3 























0-5 



10.0 







8 











— — 

















20.5 



1.0 



0.8 

 1.1 



1.1 



3.8 



c* 



7 

 9 











— 





20.5 





0.6 



0.8 



b 



3 





1.8 





3.8 





11 







0.8 



i-9 





4 





3.2 



3-8 



12. 





17 





1.1 



i-9 



5-7 





5 







12. 









00 





4-5 



5-7 







8 















A, is the length of the pipe from the lateral orifice to the end. C, the pressure at 

 which the sound began. B, its termination, by lessening the pressure ; D, by increasing 

 it. E, the note answering to the first sound of each pipe, according to the German 

 method of notation. F, the number showing the place of each note in the regular 

 series of harmonics. The diameter of the pipe was .35 ; the air duct of the mouth- 

 piece measured, where smallest, .25 by .035 ; the lateral orifice .25 by .125. The ap- 

 paratus was not calculated to apply a pressure of above 22 inches. Where no number 

 ; tand? under C, a sudden blast was required to produce the note. 



R2 



