BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE. 535 
Mean temp. 
7- 
Difference. 
Observed (mean). 
Calculated. 
0 
7-31 
•03145 
•03144 
- -00001 
J5-06 
•02555 
•02556 
+ -00001 
22-86 
•02101 
•02098 
- -00003 
30-83 
•01732 
•01731 
- -00001 
31-02 
•01724 
•017-24 
•00000 
38-79 
•01440 
•01442 
-h -00002 
46-47 
•01218 
•01218 
•00000 
54-33 
•01030 
•01032 
+ -00002 
61-74 
•00888 
•00889 
+ -00001 
6904 
•00771 
•00771 
•00000 
76-75 
•00666 
•00667 
-1- -00001 
84-82 
•00576 
•00576 
•00000 
93-10 
•00499 
•00499 
•00000 
95-59 
•00477 
•00478 
+ -00001 
Iso'pro'pyl Alcohol. ( 0 X 13)3 CHOH. 
A quantity of isopropyl alcohol from Kahlbaum was heated in a sealed tube with 
caustic baryta at 100 °. A crystalline alcoholate separated out on cooling. This, 
together with the residual alcohol, was heated over a steam-bath and the product 
re-distilled and dried. It boiled between 82°‘4 and 83°*4. Bar. 754'4 millims. 
Corrected and reduced b.p. = 82°'9. 
Vapour density : 
Found, 29'38. Calculated, 30‘00. 
As the liquid was very viscid at low temperatures, and as the times of flow were 
therefore comparatively great (about 42 mins, at 0°'4), duplicate observations were 
not made below 66 °. The observations for viscosity are as follows ;— 
Left limb. 
, 
Rigbt limb. 
Temp. 
Press. 
Corr. 
>]■ 
Temp. 
Press. 
Corr. 
V- 
i ^ 
! 0-44 
1.30-28 
•000006 
•044861 
0 
0-28 
1.30-44 
•000006 
•045174 
7-21 
1.30-55 
•000008 
•035568 
14-41 
130-53 
•000010 
•028157 
22-22 
1.30-73 
•000013 
•022204 
30-55 
1.30-65 
-000016 
•017275 
37-92 
130-42 
•000020 
•014053 
45-15 
130-29 
•000024 
•011604 
51-97 
130-43 
•000028 
•009771 
59-39 
1.30-38 
•000033 
•008157 
66-61 
130-59 
•000038 
•006921 
66-60 
130-53 
•0000.38 
•006925 
72-04 
130-58 
•000043 
•006138 
72-01 
1.30-50 
•000043 
•006144 
78-10 
130-59 
•000048 
•005409 
78-08 
130-51 
•000048 
•005405 
