between the viscosity of liquids and their chemical nature. 4117 
The observations for viscosity gave : — 
Right limb. 
Left limb. 
Temp. 
Press. 
Corr. 
Temp. 
Press. 
Corr. 
V- 
0 
0-40 
100-15 
-000082 
•001274 
0 
0-39 
100-01 
•000082 
-004-287 
4-87 
100-22 
-000085 
•004122 
4-90 
100-09 
•000085 
•004128 
9-44 
100-57 
-000087 
•003968 
9-46 
100-42 
•000088 
•003977 
14-93 
100-65 
-000091 
•003807 
14-89 
100-51 
•000091 
•003815 
19-93 
100 63 
-000093 
•003666 
19-96 
100-50 
•000093 
•003675 
25-33 
100-39 
-000096 
-003559 
25-36 
101-28 
•000096 
•003552 
3031 
100-94 
-000099 
•003415 
30-30 
100-82 
•000099 
•003426 
35-52 
100-91 
-000102 
•003281 
35-50 
100-78 
•000102 
•003287 
40-65 
100-82 
•000105 
•003168 
40-59 
100-71 
•000105 
•003180 
45-98 
100-57 
•000107 
•003057 
45-94 
100-51 
•000107 
•003062 
In reducing the observations we employed d{0°l4°) = 1 “29215 for the density, and 
the expression 
V = 1 + -Ogiisose^ + • 05111621 ^^ + - 0717455^3 
for the thermal expansion (Thorpe, loc. cit.). 
Taking 
7/7= -004280 773 =-003000 
Cj = 0°-40 ^3 = 45°-96 
7^0 (calculated) = -003019 
(from curve) = 22°-01, 
we obtain the formula 
24-379 
~ (199-17 + ’ 
which gives numbers in very close accord with those obtained by observation. 
Mean temp. 
Dilferencc. 
Obsci-ved (mean). 
Calculated. 
0 
0-40 
•00428 
•00428 
•00000 
4-88 
•00413 
•00413 
•00000 
9-45 
•00397 
•00398 
+ -00001 
14-91 
•00381 
-00382 
+ -00001 
19 94 
-00367 
•00368 
+ -00001 
25-34 
•00356 
•00353 
- -00003 
30-30 
•00342 
•00341 
- -00001 
35-51 
•00328 
•00328 
•00000 
40-62 
•00317 
•00317 
•00000 
45-96 
•00306 
-00306 
•00000 
3 s 
MDCCCXCIV,—A. 
