18194] History of Anthrazothionic Acid. 97 
two volumes of hydrogen gas condensed into one volume. In 
this case, we havea = 2, 6 = 2. Now the specific gravity of 
olefiant gas, according to Thomson, is 0974 = A, and the spe- 
cific gravity of hydrogen gas 0-073 = B. Therefore the specific 
gravity of a volume of carbon in the state of gas = x = 
0-974 —2x 0073 __(0'828 
ne to er NTIS «T 
viate th part from that found before. M. de Saussure has 
more lately found the specific gravity of olefiant gas somewhat 
heavier than the number given by Thomson. On that account 
I retain the number 0°416 for a volume of carbon in the follow- 
ing stochiometrical construction. 
- Sect. 30.—Now to exhibit our analysis according to the theory 
of volumes, it is merely necessary that the number of volumes of 
each constituent assumed correspond with the three data speci- 
fied in sect. 22 and sect. 23 ; namely, the ratio of thesulphur to 
the carbon = 2-6 : 0°328. 2. The proportion of azotic gas to the 
hydrogen gas in volume = 1 : 3. 3. The quantity of sulphur 
in 100 parts of anthrazothionic acid = 67-3. Now these condi- 
tions are completely fulfilled when we state the elements of an- 
thrazothionic acid in the following way in volumes. It consists of 
= 0-414; a number which does not de- 
ee es Bideoger = = 2 volumes ammonia 
gx 00738" 22S 0-219 ES yx 0594 — 1-188 
1 volume azote. .... =.0°969 is aaa 
% 1-188 
l volume carbon .... = 0°416 bioy cig eae aupito 
3.300 - phuretted carbon.. = 3°716 
—— ee 
3716+ 4-904 
3 yolumes sulphur* 
=a x 1:100 eeoe 
* Vanquelin found that Lampadius’s sulphuret of carbon was a compound of 
14 carbon and 86sulphur. We may, therefore, in a stochiometrical point of view, 
consider it as a compound of one volume carbon and three volumessulphur. This, 
when converted into weights, gives us 11°2 carbon and 88°8 sulphur, numbers 
which do not differ very far from Vauquelin’s results, 
+ We may assume that one volume or two volumes of sulphuret' of carbon 
combine chemically with two volumes of ammonia, and form anthrazothionic acid ; 
but the accurate number of volumes cannot be determined, till the specific gravity 
of the imaginary sulphuretted carbon gas, at the temperature of 32°, and under a 
pressure of 30 inches of mercury, be accurately ascertained. Gay-Lussac has 
indeed determined the sp. gr. of sulphuretted carbon gas by experiments at the 
boiling water température to be 2-670, But it isa question whether this determi- 
nation will apply,to@ that of the imaginary sulphuretted carbon gas at the tempera~ 
ture of 32°? »Gay-Lussac finds the specific gravity of vapour of alcohol = 1:500, 
But wher we reduce the constituents of alcohol, as found by Saussure, to volumes, 
they must be four volumes of carbon = 1°664, one volume.oxygen = 1-103, and 
six volumes hydrogen = 0-438, ‘The sum of the weights of these volumes is - 
= 3°205, Were we now toassume 1°500, the specific gravity of vapour of alcohol 
found by Gay-Lussac, as the true specific gravity of the imaginary vapour of 
alcohol at the freezing temperature, and determine from that the change of volume 
which the 11 yolumes undergo, it is obvious that we could uot obtain a whole 
Vou, XIIL N° II. G 
