72 
PROFESSOR W. RAMSAY AND DR. ¥>. ^y TRAVERS 
pressure bore a linear relation to the absolute temperatures of methyl alcohol. From 
these results, plotted on a much more open scale, the temperatures of the liquefied 
gases corresponding to definite pressures were obtained, by finding the temperatures 
of methyl alcohol corresponding to the same pressures, and reading the ratio 
corres[)onding to those temperatures. By multiplying the temperatures of methyl 
alcohol by tlie ratios, the tempeiatures of the liquids at the corresponding pressures 
were calcidated. The following table of vapour-pressures was then constructed 
(compare Plate i):— 
Pressuie. 
Temperature. 
Pre.ssure. 
Temperature. 
* 
A’ goii. 
Kiyptoii. 
Xenon. 
Argon. 
Krypton. 
Xenon. 
iiiillim’. 
1 
inillims. 
300 
78-94 
110-43 
148-9 1 
18000 
1.34-88 
182-79 
248 - 3 
too 
81-31 
113-84 
153-2 1 
20000 
137-36 
186-00 
252-6 ' 
500 
83 - 32 
116-14 
156-8 1 
22000 
139-65 
188-88 
256 - 6 ! 
600 
84-89 
118-35 
159-7 
24000 
141-80 
191-68 
260-2 
700 
86 - 38 
120-19 
162-0 t 
26000 
143-82 
194-32 
263-8 1 
760 
86-90 
121-33 
163-9 ! 
28000 
145-80 
196-72 
267-2 ; 
800 
87-77 
122-01 
164-7 
30000 
147-58 
199-02 
270-2 
1000 
89 - 90 
124-84 
168-8 
32000 
149-28 
201-21 
273-7 
1500 
93-52 
129-55 
176-8 
34000 
150-88 
203 - 32 
276-0 
2000 
97 - 95 
135-23 
182-9 
36000 
152-52 
205-40 
278-9 
3000 
103-33 
142-17 
192-4 
38000 
154-11 
207-25 
281-9 
4000 
107-27 
147-34 
199-6 
40200 
155-60 
— 
— 
6000 
113-58 
1.55-47 
210-8 
Critical 
8000 
118-60 
161-95 
219-6 
41240 
— 
210-5- 
— 
10000 
122-72 
167-31 
226-8 
Critical 
12000 
126-31 
171-87 
233-1 
43500 
— 
— 
287-7 
14000 
129-47 
175 - 88 
238-7 
Critical 
16000 
j 
132-73 
179-45 
243 - 7 
The vapour-pressures of argon were measured for certain temperatui’es by 
Professor Olszewski; the data which lie gives are (‘Phil. Trans.,’ A, 1895, 
p. 258): — 
Pressures. 
T. argon. 
T. Avater. 
Ratios. 
4 
740-5 
86°-l 
372°-27 
0-2313 
18010 
132-9 
495-00 
0-2705 
19230 
134-7 
498-4 
0-2703 
20750 
136-8 
503 - 4 
0-2718 
22040 
137-9 
505-8 
0-2726 
22650 
138-6 
507-4 
0-2732 
27210 
143-5 
527-S 
0-2771 
28880 
144-4 
521-2 
0-2771 
38460 
152-0 
538-6 
0-2822 
Olszewski. 
Ratios 
smoothed. 
R. and T. 
ratios. 
Did'. 
0-2311 
0-2337 
0-0026 
0 - 2699 
0-2729 
30 
0-2710 
0-2738 
28 
0-2727 
0-2754 
27 
0-2733 
0-2762 
29 
0-2738 
0-2767 
29 
0-2771 
0-2800 
29 
0-2782 
0-2811 
29 
0-2834 
0 - 2860 
26 
