ON THE SONIFEROUS VIBRATIONS OP THE GASSES. 



169 



13. Light carburet led hidrogen, produced by distillation from Exp. 13. 



chips of deal. 



1 . Lt. carb. hidt-ogen 



2. 



3. 



4. ----- . 

 5. 



>^9 



- - 



- - _ 





11 



14-92 



— 



IS 



21 55 



60 





28-45 



— 



- - 



2913 



•1075 



■1075- 



•1075 



•1100 

 -1120 



Light carba- 

 retted hidto- 

 gen. 



The pump being worked till the pressure of the gas was 

 again 1492, the sound was '1060, The pitch, from a mean 

 of the six monochord-lengths of wire, is more than an octave Its pitch, 

 and two commas above that of air, 



14. Ether. The graduated glass tube was screwed upon the ^^f'J^* 

 stop-cock of the transfer plate, and filled with ether. The 

 pressure on the gauge being 0-62, with no acid in the receiver, 

 a small part of a cubic inch of ether, as shown in the left-hand 

 column of the following table, was admitted into the receiver 

 through the stop-cock. 



Sulph. <ther. 



•05 



1. Ether 



60 







•05 



2. 









•05 



3. 



— 



_ . 



•05 



4. 



— 



_ _ 



•05 



5. 







- _ 



•05 



6. 



— 



- - 



» - 



7. 



— 



- - 



•00 



Air added - - - - 



__ 



_ _ 



1-48 



2970 



•09650 

 -10 20 

 •10387 

 •11000 

 •11290 

 •11450 

 uncert. 



•22150 



applied 



a cloth The receiver 

 ^., r 1, heated. 



T.he gauge tell 



After the seventh transfer of ether, we 

 dipped in warm water round the receiver. 

 0^38 J and we imagined we could hear two sounds, about a fifth 

 difTerent in pitch ; the one a wheezing tone, the other much 

 clearer. The hemispherical dish was about half full of liquid 

 ether within the receiver. By a mean of six lengths, the pitch 

 is almost an octave and major semitone more acute than the 

 sound of atmospheric air. The air and ether vapour give a 

 sound which is only about a comma-deficient minor semitone 

 more acute. 



15. Alcohol, introduced into the receiver in the same manner Exp. 1.5 

 as the ether, sunk the gauge only 055, and produced no sound. 

 When air was added to fill the receiver, the sound was 02260, 

 and very indistinct. Thermometer in the room 60°, barometer 

 29-7. Kot 



Alcohol. 



