BETWEEN THE VISCOSITY OF LIQUIDS AND THEIE CHEMICAL NATURE. 475 
[ Mean temp. 
i 
'/■ 
DiTerence. 
Observed (mean). 
Calculated. 
0-45 
-006414 
•006414 
•oocooo 
7-86 
-005884 
•005893 
+ -000009 
I3'66 
-005523 
•005529 
4- 000006 
1917 
-005209 
•005215 
+ -000006 
2.5-44 
-004903 
•004890 
- -000013 
31-88 
•004588 
•004567 
- -oooooi 
^ 38-60 
•004300 
•004.301 
+ -oooooi 
45-64 
•004032 
•004030 
- -000002 
51-01 
•003844 
•003841 
- -000003 
57-37 
•003633 
•003634 
+ -OOOOOI 
61-98 
•003195 
•003495 
•000000 
67-86 
•0033-28 
•003328 
-000000 
Isopro 2 :)yl Bt’omide. (CH 3 ) 3 CHBr. 
Obtained from Kahlbaum. After drying over phosphoric oxide, the liquid boiled 
between 59°'26 and 59°'30. Bar. 748‘4 milliins. Corrected and reduced b.p. = 59°’73. 
Vapour density: 
Found, 61'28. Calculated, Gl'38. 
The observations for viscosity were :—• 
Left limb. 
Right Limb. 
Temp. 
Press. 
Corr. 
1 
‘I- 
Temj:!. 
Press. 
Corr. 
0-31 
101-10 
•000061 
•006013 
0-35 
100-91 
•000061 
•006029 
5-13 
100-95 
•000065 
•005683 
5-11 
100-84 
•000064 
•005694 
10-16 
100-75 
•000068 
•005363 
10-13 
100-64 
•000068 
•005379 
15-30 
100-61 
-000071 
•005061 
15-30 
100-50 
•000071 
•005075 
20-32 
100-60 
•000074 
•004796 
20-24 
100-45 
•000074 
•004811 
25-50 
100-56 
•0000/8 
•004.543 
25-43 
100-43 
•000078 
•004558 
30-00 
100-56 
•000081 
•004337 
29-91 
100-45 
•000081 
•004350 
35-96 
100-39 
•000085 
•004087 
35-84 
100-33 
•000085 
•004104 
41-19 
100-21 
-000089 
•003886 
41-16 
100-15 
•000088 
•00,3902 
• 46-.34 
99-91 
•000092 
•003698 
46-39 
99-79 
•000092 
•003709 
50-89 
99-71 
•000095 
•003550 
50-93 
99-59 
•000095 
•003558 
56-80 
99-50 
•000099 
•003366 
56-73 
99-45 
•000099 
•003376 
In reducing the observations, the value 1‘3397 for the relative density at 0“, and 
the expression 
V = 1 + -0212494^ + •O 5 I 887 C + 'OgGSGo^h 
for the thermal expansion (Zander, ‘ Annalen,’ 214, IGl), have been adopted. 
3 P 2 
