BETWEEN THE VISCOSITY OP LIQUIDS AND THEIR CHEMICAL NATURE. 77 
The value 0‘91016 for the density at 0°, and the expression 
V = 1 + -OjllOiSG t + -OjIlGSG t" + '0-195991 
have been used in reducing the observations. 
Taking- 
rj-^ — •007GG1 r}^ — ■002G02 (calculated) = ‘004465, 
= 0°‘39 t. = 9G°75 t. (from curve) = 41°‘7G, 
we obtain the formula 
73-6005 
~ (125-269 ’ 
whicli o-ives values in good agreement -svith those of observation. 
o c? o 
Methijl Propionate. CIL.CH 2 .COOCH 3 . 
The boiling-point was constant at 79'^’GG, Bar., 759'1 millims. Corrected and 
reduced b.p. = 79°‘70 (79^‘67, Y. and T.). 
Observations for viscosity gave :— 
Left limb. 
Temp. 
Press* 
Corr. 
7- 
0°39 
100-34 
•000046 
•005789 
9-73 
100-33 
•000051 
•005139 
16-81 
100-26 
•000055 
•004719 
23-70 
100-27 
•000059 
•004363 
29-61 
100-23 
•000062 
•004096 
38-67 
100-23 
•000067 
•003746 
45-58 
100-22 
•000071 
•003472 
52-64 
100-54 
•000075 
•003253 
60-38 
100-39 
•000080 
•003027 
68-55 
100-39 
•000085 
•002807 
75-86 
100-40 
•000089 
•002638 : 
Right limb. 
Temp. 
Press. 
Corr. 
0°37 
100-25 
•000046 
•005787 
9-73 
100-25 
•000051 
•005145 
16-77 
100-22 
•000055 
•004731 
23-21 
100-21 
•000059 
•004372 
29-62 
100-13 
'000062 
•004100 
38-65 
100-14 
•000067 
•003746 
45-60 
100-12 
•000071 
-003481 
52-67 
99-82 
•000075 
•003256 
60-37 
100-33 
•000080 
•003029 
68-43 
100-30 
•000084 
•002816 
73-84 
100-31 
•000089 
•002636 
We have used 0’9387 as the value of the density at 0 °, and the expression 
V = 1 d- ‘OolSOfO t 4- •0,13275 f 4 •04G943 C 
in reducing the observations. 
