in the Condensation of the Vapour of Alcohol. 67 
TABLE. 
ro) Th 2 ek wy Os a bere 
2 E = | State of the Calori- | 9 Result 
= 3 = | meter. 3 ss 
os Of ies A = : z Sire 
2 < — S ' 73) 1 = On, © oO: 
Se pee : 2, 4 = < = 2) eee 
Pst ~ ~ ke: . 2) oa | 
a oi ae a {5 Polit Eh te te gee SS 
_ . ce aT < s 
tee == ES 2 ime is a) 22 jno aot iS 
i 2 = Ss re - o oS fee Ol oe 
a | > = Cn oa 1 n oS Bo gr 
a = 5 io) & S ~ Spr e>ox ts 
eee 2 2 Oo ie CEs eeeg 
E eso l/s es = S eihtonewu 
oe Om = 3. = Ss O75 S=E 
o/Oo8)2 2 Shep 2 ah Wi) SCs 
3) oye re Pa PS i vere Do |S@sys 
ph) eves [Mic ) e's Y S53 )/5e6 (67°58 
= agate 6 RS ee = se leela@silees 72 
Ss Yo ee ee = T3) a O im San Sans & 
Ala ls | & aii ES: TIGL tye 
inin gram 
Ne Dla 
n 
rs 
° 
On 
~ 
° 
~_ 
em 
oT 
° 
= 
la 
wi Oy 
° 
~ 
co 
ps 
nes 
© 
Ko) 
fos) 
or 
On determining, by calculation, the quantity of water which 
may be heated one degree, by the heat developed in the com- 
bustion of one pound of this vapour, I took care to keep an 
account of the difference between the capacity of water for heat 
and that of alcohol, when I determined how much heat should 
have been communicated to the calorimeter by the alcohol, and 
produced by the condensation of the steam, by being ‘ool? in 
the worm. 
In order to prove the state of the elements of the water which 
exist in the steam of alcohol, it must be shown how much water 
these elements ought to form. 
We shall select the experiment which was made with alcohol 
of the specific gravity of $1763, and which contained the least 
water. The quantity of steam condensed in this experiment was 
56°61 grammes. 
In 100 parts of this alcohol there were 
91-79 parts of pure alcohol of Lowitz,.and 
#-21 parts of water. 
Consequently there were in the 56-61 grammes of alcohol con- 
densed in the calorimeter, 
51-962 grammes of alcohol of Lowitz, and 
4°648 of water. 
Now, as M, de Saussure has shown that there are 47 parts of 
water in 100 parts of alcohol of Lowitz, there must have been 
24°422 grammes of water in the 51°962 grammes of alcohol of 
Lowitz, which were condensed in the calorimeter. 
E 2 If 
