THE PROPERTIES OF WATER AND OF STEAM 
115 
VAPOUR-Densities (Saturated) of Water from Regnault's Heats of Vaporization. 
t.° c. 
T.°abs. 
* 
dp/dt. 
L (total). 
Q. 
Ht. of 
Yap. L. 
S 1 ~ s 2- 
*i- 
v.d. 
0 
273 
4-600 
0-329 
606-5 
0 
606-5 
211,130 
211,131 
8-74 
10 
283 
9-165 
0-609 
609-5 
10 
599-5 
108,730 
108,731 
8-83 
20 
293 
17-39 
1-074 
612-6 
20 
592-6 
58,867 
58,868 
8-89 
HO 
303 
31-55 
1-81 
615-7 
30 
585-7 
33,384 
33,385 
8-94 
40 
313 
54-91 
2-93 
618-7 
40-1 
578-6 
19,722 
19,723 
8-98 
50 
323 
91-98 
4-58 
621-7 
50-1 
57P6 
12,078 
12,079 
9-04 
60 
333 
148-8 
6-91 
624-8 
60-1 
564-7 
7,671 
7,672 
9-06 
70 
343 
233-1 
10-11 
627-8 
70-2 
557-6 
5,026 
5,027 
9-10 
80 
353 
354-6 
14-40 
630-9 
80-3 
550-6 
3,386 
3,387 
9-13 
90 
363 
525-4 
20-01 
633-9 
90-4 
543-5 
2,339 
2,340 
9T8 
100 
373 
760-0 
27-14 
637-0 
100-5 
536-5 
1,657 
1,658 
9-20 
110 
383 
1,075 
36-27 
640-0 
110-6 
529-4 
1,191 
1,192 
9-29 
120 
393 
1,491 
47-35 
643-1 
120-8 
522-3 
877-4 
878'5 
9-32 
130 
403 
2,030 
60-90 
646-1 
1310 
515-1 
656-1 
657"2 
9-39 
140 
413 
2,718 
77-06 
649-2 
141-2 
508-0 
499-0 
500-1 
9-44 
150 
423 
3,581 
96-17 
652-2 
151-5 
500-7 
384-7 
385-8 
9-52 
160 
433 
4,652 
118-5 
655-3 
161-7 
493-6 
300-7 
301-8 
9-58 
170 
443 
5,962 
144-1 
658'3 
172-1 
486-2 
238-1 
239-2 
9-65 
180 
453 
7,546 
173-4 
661-4 
182-4 
479-0 
190-6 
191-7 
9-73 
190 
463 
9,443 
206-5 
664-4 
192-8 
471-6 
154-2 
155-3 
9-81 
200 
473 
11,689 
243-4 
667-5 
203-2 
464'3 
126-1 
127-3 
9-88 
210 
483 
14,325 
284-4 
670-5 
2137 
456-8 
104-0 
105-2 
9-96 
220 
493 
17,390 
329-4 
673-6 
224-2 
449 -4 
86-50 
8770 
10-05 
230 
503 
20,926 
378-5 
676-6 
234-7 
441-9 
72-54 
73-76 
10-13 
p, Regnault’s formula H ; dp/dt from same formula; L (total), Q and L from Regnault. 
As PtEGNAULT’s measurements do not extend beyond 230° the higher isothermals 
were smoothed as well as possible and made to cut the vapour-pressure lines at 
certain points, to which we were guided to some extent by their own regularity, and 
to some extent by extending the curve drawn to pass through the points representing 
the volumes of 1 grm. of saturated vapour. The results cannot be far from the truth. 
The next table shown was constructed by reading the pressures and temperatures 
corresponding to equal volumes. 
Q 
