i66 



ON THE SONIFEROUS VIBRATIONS OF THE GASSES. 



Exp. 4. 



Oximuriati* 



gas. 



Exp, 5. 

 Olefiant gas. 



Its pitch. 



Exp. 6. 

 Olefiant and 

 oximuriatic. 



Pitch. 



♦.xp. 7, 

 Uigen gas. 



4. Chlorine gas, obtained from oxide of manganese and mu- 

 riatic acidj and collected over water. In this experiment the 

 gauge was not used. The receiver was filled by three succes- 

 sive and nearly equal quantities of the gas. The pitch was not 

 quite a minor 3d lower than that of air. 



Chlorine gas 



67 — 



•25400 



■27675 

 279CO 



5. Olefiant gas, or supercarburetted hidrogen, produced by 

 boiling, in a glass retort^ alcohol and sulphuric acid. 



1. Olefiaot gas - - 

 2. 



4. 



60 



•0.9 



739 



59 



•13 



15-65 



59 



'16 



22-62 



59 



— 



29-18 



•23400 



•23825 

 •24100 

 •24120 



6. The pitch, taking the mean length, is almost a major semi- 

 tone below that of atmospheric air. Having noted this experi- 

 ment, the pump was worked till the pressure was only 1568, 

 and I hree measures of chloiine gas were added, in succession, to 

 the olejianl gas, which remained in the receiver. 



. Chlorine added - - 

 (.remained - - - 



■\::-:: 



55 



2-70 



1948 



54 





26-14 



54 



4-39 



21-76 



53 





2775 



53 



6-41 



21-34 



•25650 

 •26000 

 •25550 

 •27400 

 •26925 



During this experiment, the barometer ascended from 29- IS 

 to 29-75. The tone was very peculiar, and cannot be easily de- 

 scribed. After each addition of gas, the pressure began to di- 

 minish, and the pitch to ascend. The mean length gives the 

 pitch nearly a superfluous second lower than that of atmosphe- 

 ric air. The brass plate of the pump was found entirely co- 

 vered with a purplish gray oil, which was extremely difficult to 

 remove, and which was not quite removed for a long time 

 after. 



7. Oxigen gas, obtained from oxide of manganese by heating 

 it in an iron retort. 



1. Oxigen gas - - - 



6.9 



.03 



795 1 



2. - 



69 



-10 



15'8l 



3. ------ - 



69 



- - 



236J 



•23375 

 •23600 

 •23900 



Here 



