292 J. W. Gibbs — Vapor-Densities. 
Temperature.....------ 10°5 12°5 16 18°5 
Pressure of sat. vapor... 16° 18°5 22 26°2 
Pressure of experiment.. 14°69 15°20 15°97 23°53 
Taste III.—Formic Acip. 
Experiments of Brneav. 
Eee Densit f observed 
Temperature. Pressure. ca eg “ib. v observed. . density. 
216°0 690 1-60 1°61 +01 
1840 750 1:64 1°68 +04 
125°5 687 2°03 2°05 +02 
1255 645 2°02 2°03 +01 
1245 670 2-04 2-06 +02 
124°5 640 2°03 04 
118-0 655 2°13 (2°14) (+01) 
118-0 650 2°13 13 00 
1175 688 215 2°13 —"02 
115° 649 217 2-20 +03 
115-5 640 2-16 2°16 
1 655 2-18 (2°13) (—"05) 
1115 690 2°25 3°92 03 
1115 90 2°25 2°25 
ll 2-22 (2°13) (—*09) 
[687] 2-30 2°31 re 
105-0 691 2°35 35 00 
105°0 650 2°34 2°33 —0l 
1050 630 2°33 2°32 —01 
101°0 693 2°42 2°44 +02 
1010 650 2-40 2°41 + 
99°5 690 2°44 Se a + 08* 
2°44 2°49 7 
99°5 676 2-44 2°46 a3 
5 662 2-43 2-44 + 
99 2-42 2°42 e | 
99°5 619 2-41 2°41 a | 
602 2°41 2:40 en 
99°5 55 2-39 234 ¥ 
34:5 28-94 2°89 277 ee 
315 3-04 2°40 2°60 +°20 4 
8:83 2°67 2°69 +702 - 
18-28 2-81 2°76 —2e : 
7-40 2:88 2°83 a 
24°5 17°39 2:88 2°86 . 
0 25-17 2°95 3°05 +°10* 
20-0 16-67 2-93 2°94 1 ‘ 
20-0 ‘99 2°84 2°85 +01 
20-0 2°72 2-64 2°80 +16 
18°5 2 3°23 + ae 
16-0 15-97 2-97 3°13 i? 
15° 2°61 2-72 2°86 +14 
y 2-90 2°93 22 
15°20 3-00 3°14 +14* 
110 7-26 2-95 3°02 +°07 
105 14-69 Ss ee eee 
ee 
Whether the large excess of observed density in these cane’ 
represents a property of the vapor, or an incipient condensatiop 
