BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE, 73 
we obtain the formula 
0144673 
“ (68-234 + ’ 
which gives results in good agreement with the observed vadues/''* 
Ethyl Formate. H.COOCJH.CHs. 
Boiling-point constant at o4°-65. Bar., 771‘1 milliins. Corrected and reduced 
b.p. = 54°-25 (54'3, Y. and T.). 
Obsei’vations for viscosity gave — 
Left limb. 
Eight limb. 
0 
Temp. 
Press. 
Corr. 
V- 
Temp. 
Press. 
Corr. 
'/• 
0-45 
100*19 
-000053 
-0050-28 
0-47 
99-74 
•000053 
•005020 
6-56 
100-81 
-000057 
•004662 
6 58 
100-77 
•000057 
•004650 
11-52 
100-70 
-000060 
•004415 
1 11-52 
100-64 
•000060 
•004403 
16-58 
100-61 
-000063 
•004177 
j 16-58 
100-51 
•000063 
•004166 
22-59 
100-59 
-000066 
•003916 
! 2-2-59 
100-50 
•000066 
•003904 
27-90 
100-96 
-000069 
•003708 
27-90 
100-90 
•000069 
•003689 
33-25 
100-92 
-000073 
•003507 
33-25 
100-84 
•000073 
•003495 
38-10 
100-89 
-000075 
•00.3351 
.38-08 
100-79 
•000075 
•003337 
43-37 
100-78 
-000078 
•003187 
43-36 
100-72 
•000078 
•003169 
48-64 
100-63 
•000081 
•003038 
48-59 
100-54 
•000082 
•003023 
52-03 
100-54 
-000083 
•002956 
52-03 
100-47 
000083 
•002928 
The value d (07^°) = 0'9480 for the density, and the expression 
V = 1 + •0,130917 t -f •O. 5 I 9198 -f -0730497 C 
for the thermal expansion, have been used in the reduction of the observations. 
Taking 
•>^^=•005025 713 = •002942 (calculated) = •003845, 
= 0°^46 ^3 = 50°^03 ? 3 (from curve) = 24°-22, 
* To save sj^ace, it has been deemed uuuecessaiy to give the compai’isons between the observed and 
calculated values, as vras done in the first paper. There is no longer any need to offer proof of the 
validity of the Slotte formula as an empirical expression of the relation between viscosity and 
temperature, especially in the case of liquids of the typo now studied. It may be stated, however, that 
the comparison has been made in all cases, and that the general agreement is of the same order as that 
previously found. 
MDCCCXCVII.-A. L 
