DR. ANDREWS ON TITE GASEOUS STATE OE MATTER. 
441 
Table XVII. — Values of p for 6 0, 5 and 64°. 
p- 
P (6° 5). 
P'(CA°). 
0-9254 
12-31 
25-06 
0 491 
0-9161 
13-79 
28-07 
0-491 
0-9054 
15-39 
31-39 
0-490 
0-8935 
17-13 
34-92 
0-491 
0-8748 
19*81 
40-54 
0-489 
0-8532 
22-83 
46-56 
0-490 
0-8235 
26-51 
54-33 
0-488 
0-7785 
1 
31-73 
64-96 
0-489 
From the foregoing table it appears that the values of p within the limits of pressure 
employed are always equal — that is to say, the ratio of the external pressures is always 
the same for homologous points of the curves of 6 0, 5 and 64°. The experiments could 
not be carried to higher pressures on account of the liquefaction of the gas at 6 0- 5. In 
the next table the values of /z for the homologues of 64° and 100° are given. 
Table XVIII. — Values of gj for 64° and 100°. 
P- 
Pi 64°). 
P'(100'). 
(*■ 
0-9404 
20-36 
30-79 
0-661 
0-9330 
22-56 
34-10 
0-662 
0-9254 
25-06 
37-88 
0-662 
0-9161 
28-07 
42-37 
0-662 
0-9054 
31-39 
47-39 
0-662 
0-8935 
34-92 
53-29 
0-655 
0-8748 
40-54 
61-76 
0-656 
0-8532 
46-56 
70-95 
0-656 
0-8235 
54-33 
83-04 
0-654 
0-7785 
64-96 
101-53 
0-640 
0-7115 
81-11 
127-96 
0-634 
0-5762 
106-80 
236-84 
0-451 
The values of g are again equal till very high pressures are reached. Thus from 
20-4 to 3T4 atmospheres, and from 30’8 to 47*4 atmospheres, the agreement is absolute ; 
after which a slight diminution in the value of (m occurs, but only to the amount of 
of the whole, till the respective pressures of 54‘3 and 83-0 atmospheres are attained. 
Even at 81T and 128-0 atmospheres the value of g> has only fallen from 0-661 to 0-634. 
But at still higher pressures we reach a new phase, and at the respective pressures of 
107 and 237 atmospheres the value of p has fallen to 0-451. 
I have calculated the values of p and ^ from the experiments at lower temperatures 
in my former communication*. As these experiments were chiefly made at tempe- 
ratures not much above the critical point of carbonic acid, when the intermediate con- 
ditions of matter corresponding to the fall from the gaseous to the liquid state, and 
those corresponding to the liquid state itself, are easily recognized, they form a valuable 
complement to the foregoing. 
* Philosophical Transactions for 1869, pp. 584-86. 
