REGNAULT’S HYGROMETRICAL RESEARCHES. 
633 
Comparative Table of the Tensions of Aqueous Vapour given by 
Pure Water and Mixtures of Sulphuric Acid and Water. 
Tempe- 
ratures. 
Can ov 
Tempe- 
ratures. 
Pure water. 
Tensions. 
mm 
6534 
6-998 
7492 
8-017 
8574 
9:165 
9-792 
10:457 
11°162 
11-908 
12-699 
13°536 
14-421 
15°357 
16:346 
17°391 
18-495 
19-659 
20°888 
22-184 
23'550 
24-988 
26°505 
28-101 
29°782 
31548 
33°406 
35°359 
37-411 
39565 
41827 
Pure water. 
Tensions, 
mm 
6-534 
6:998 
7-492 
8-017 
8574 
9°165 
9-792 
10:457 
11-162 
11-908 
12-699 
13°556 
14-421 
15°357 
16346 
SO3 + 2H20, | SO3 + 3H20. 
Tensions. | Relations. | Tensions. | Relations. 
mm mm 
0-105 0-016] 0-388 0-0594 
0-106 | 0:0154 0-409 | 0:0584 
0-108 | 0:0147 | 0-430 | 0-0573 
0-110 0:0140 0-452 0:0564 
0-112 | 00183 | 0-476 0:0555 
0-115 0:0126 | 0501 0:0546 
0-118 0-0121 0-527 00538 
0-121 O0-0116 | 0-556 0:0531 
0-124 00112 | 0:586 | 0:0525 
0:127 | 0:0107 | 0-617 0-0518 
0-151 0:0103 0-651 0-05138 
0135 00100 | 0687 | 0:0507 
139 0:0097 0:725 0:0503 
0-144 | 0:0094 | 0-765 0:0498 
0-149 0:0091 0-808 00494 
0-154 0-0088 0°853 0-0491 
07159 | 0:0086 | 0-901 0-0487 
0-165 00084 | 0-952 | 0-0484 
0-171 90-0082 1-006 0 0482 
0-177 | 0:0080 1-064 0-0479 
0-184 | 0:0078 1-125 0:0478 
0191 0:0076 1-190 0:0476 
0-199 | 0:0074 1-258 0-0475 
0-207 | 0:0073 1331 0:0474 
0:216 09-0072 1:408 0-0473 
0-225 0:0071 1-490 | 0-0472 
0:235 0:0070 1-577 0:0472 
0-245 0-0069 1670 | 0:0472 
0-256 0-0068 1-767 0-0472 
0-268 | 0:0067 1°871 0-0473 
0-280 | 0:0067 1981 00474 
S03 + 5H20. S03 + 6H20. 
Tensions. | Relations. | Tensions. | Relations. 
mm mm 
1:294 | 0:1980 |} 2-137 | 0°3271 
1-399 | 0:1999 | 2:296 | 0:3281 
1510 | 0-2015 2464 | 03289 
1-628 | 0-2031 2-641 0°3294 
1:753 | 0°2045 2-829 | 0:3299 
1-885 0:2057 3029 03305 
2-025 | 0-2068 3-240 0°3309 
2173 | 02078 | 3-463 | 0:3312 
2331 02088 | 3-699 | 03314 
2-498 0:2098 3950 03317 
2°674 | 02106 | 4215 | 03319 
2861 02114 4-495 0°3321 
3°059 | 02121 4-793 0:3324 
3-270 | 02129] 5:107 0°3328 
3°492 0:2135 5440 | 03328 
SO3 + 4H20, 
Tensions. | Relations. 
mm 
0-861 01318 
0-922 | 0:13817 
0-985 0:1315 
1:053 0:13138 
1:125 0-1312 
1-200 | 0:1309 
1-280 | 0°1807 
1364 01304 
1-454 0-13038 
1548 0°1300 
1648 0-1298 
1-753 0:1295 
1:865 0:1293 
1-983 0:1291 
2-108 0:1289 
2-241 0:1288 
2-380 0:1287 
2°528 0-1286 
2-684 0°1285 
2-849 | 0:1284 
3°024 01284 
3°209 0°1284 
3°405 0-1284 
3611 0-1285 
3°830 | 0°1285 
4-061 01287 
4°305 0-1289 
4564 | 01291 
4-838 0:1293 
5°127 0:1297 
§-432 0:1299 
SO3 + 8H20, 
Tensions. | Relations, 
mm 
3168 0-4848 
3398 0-4856 
3643 0-4862 
3902 0°4867 
4:176 | 0:4870 
4-466 0-4873 
4:773 0:4874 
5-098 0-4875 
5:443 0°4876 
5:808 0:4877 
6194 04877 
6:603 04878 
7:086 0:4879 
7A95 0-4880 
7:980 0-4881 
