. 
4 On the musical Sounds of the Gases. 
comma-deficient minor Third, lower than, the sound yielded 
by the same. pipe blown in a similar manner with atmo- ~ 
spheric air, as mentioned below. 
2d. When carbonic acid gas (from marble, &c.) was 
used, the unison on the monochord was ‘108, from a mean 
of seven experiments, greatest *117, least -082; whence the 
vibrations were 1111°111, andthe sound 117°94712 4+ 9f+ 
10m, or a comma-redundant major Tone + 2°9471 = below 
the sound of atmospheric air. 
3d. When oxygen gas (from the oxide of manganese} 
was used, the length was °095, froma mean of 4, greatest 
*100, and least ‘83 ; whence the vibrations were 1263°158, 
and the sound 4:67612, or less than half a Comma below’ 
the sound of atmospheric air. ‘ 
4th. When atmospheric air was used, the length of 
string was °0945, from a mean of six experiments, some in 
and some out of the receiver, whereof the greatest were :095, 
and the least 093; whence the vibrations were 1269°841 
per second. 
5th. When light carburetted hydrogen (from wood) was 
used, the length was -089, from a mean of three experi- 
ments, greatest ‘090, and least :088; whence the vibrations 
were 1348315, and the sound 52*9459> + f + 5m,ora 
Semitone medius + 5°9459= + m higher than the sound 
yielded by atmospheric air. 
6th. When nidrous gas (from copper and nitric acid) was 
used, the Jength was ‘089 from a mean of four experiments, 
greatest *100, and least ‘0§3; and the vibrations and pitch, 
as in the last case. 
7th.. When ether vapour was used, the length was 065, 
ina single experiment; whence the vibrations were 1846°153, 
and the sound 330°47172 + 6f + 29m, or a comma-re- 
dundant minor Fifth (or 23ds) + 8°4717 = +m higher than 
the sound of atmospheric air. 
8th. When/dydrogen gas (from zinc, &c.) was used, the 
length on the monochord was ‘049, from a mean of eight 
experiments, greatest ‘O61,,and least -042; whence the vi- 
brations were 2448°97Q in 15, and the sound 579°7972> 
+ 19f + 50m, or an Octave all but 32°2028> + 3m* above 
the sound yielded by atmospheric air, in the same pipe. 
Tn the Table of Experiments referred to, the states of the 
* Jn an enigmatical Paper in the Philosophical Transactions for 1800, 
distinguished by its splenetic attacks on the valuable “ Harmonics” of Dr. 
Robert Smith, it is said (see also Nicholson’s 4to Journal, vol. v. p. 85) that 
the pitch of a pipe blown by pure hydrogen gas, should le a minor fourteenth 
(VUI+ 7th =1120% + 22f + 97m) higher than if blown by common air! 
barometer 
