76 
PROFESSOR W. RAMSAY AND DR. S. YOUNG 
B. Weight .—The weight of portion B was ascertained by comparisons of its volume 
with that of A at the same temperatures and pressures. As the real pressures were 
in no cases the same for both, it was necessary to construct curves showing the 
relation of the pressures of A to its volume at constant temperatures, and to read off 
the volumes at the required pressures. The mean of twelve observations at various 
temperatures and pressures gave the number 
0*01227 gramme. 
(45.) T = 50° (Alcohol). 
Vapour-pressure. 
Mean. 
mms. 
12731 
mms. 
1275 
1277 
1275 
1275 J 
(46.) T = 75° (Alcohol). 
Vapour-pressure. 
Mean. 
mms. 
26381 
2637/ 
mms. 
2637-5 
(47.) T = 100° (Chlorobenzene). 
Volume. 
Volume of 
1 gramme. 
Pressure. 
P. V. 
Vapour- 
density. 
Volume. 
Volume of 
1 gramme. 
Pressure. 
P. V. 
Vapour- 
density. 
c.cs. 
C.CS. 
mms. 
C.CS. 
C.CS. 
mms. 
1-1610 
94-63 
2978 
3458 
41-14 
0-80529 
65"63 
4104 
3305 
43 "04 
1-0006 
88-89 
3150 
3435 
41-40 
0-76967 
62-73 
4265 
3283 
43"33 
1-0201 
83-14 
3334 
3401 
41-82 
0-73419 
59-84 
4436 
3257 
43-67 
0-94895 
77-34 
3546 
3365 
42-27 
0-69876 
56-95 
4618 
3227 
44"08 
0-87710 
71-48 
3818 
3350 
42"46 
0-68101 
55-50 
4720 
3214 
44-25 
0-80529 
65-63 
4099 
3301 
43-09 
0-66325 
54-06 
4820 
3197 
44-49 
0-73419 
59-84 
4432 
3254 
43-71 
L.P.G. H.P.G. 
0-69876 
56-95 
4636 
3239 
43-91 
• . 
4865 485/ 
0-66325 
54 06 
4815 
3194 
44-54 
. . 
4868 4861 
1-1964 
97-51 
2893 
3461 
41-09 
. . 
4841 4348 
. 
4853 
10554 
86-02 
3243 
3423 
41-55 
, . 
4851 4853 
0-91310 
74-42 
3668 
3349 
42-47 
, . 
4852 4844 
0-84116 
68-56 
3946 
3319 
42-88 
4855 4847J 
