between the viscosity of liquids and their chemical nature. 503 
Mean temjj. 
'/• 
Difference. 
Observed (mean). 
Calculated. 
7%6 
■003638 
■003638 
■000000 
11-72 
■003495 
•003498 
+ ■000003 
15-24 
■003376 
•003377 
+ ■000001 
19-02 
■003258 
•003254 
-■000004 
23-01 
■003131 
■0031.30 
-■000001 
27-22 
■003007 
■003008 
+ ■000001 
32-43 
■002863 
•002865 
+ ■000002 
36-00 
■002772 
■002773 
+ ■000001 
40-04 
■002675 
■002674 
-■000001 
44-12 
■002584 
■002579 
-■000005 
47-62 
•002.503 
■002502 
-■000001 
52-20 
•002405 
■002405 
■000000 
53-86 
•002377 
■002372 
-■000005 
Methyl Ethyl Ketone. CHg.CHj.CO.CHg. 
A quantity of this ketone, obtained from Professor Japp, and prepared by Kahl- 
BAUM from ethylic methaceto-acetate by Boring’s method (‘Annalen,’ 204, 17) was 
dried by means of anhydrous copper sulphate and submitted to fractional distil¬ 
lation. Eventually a portion was obtained which boiled between 79° and 83°. 
Bar. 772’88 millims. 
The quantity of the material was insufficient to allow of further treatment. 
A vapour density determination gave 35*14; Calculated, 36*00. 
The observations for viscosity gave :— 
Right limb. 
Left limb. 
Temp, 
Press. 
Corr. 
V- 
Temp. 
Press. 
Corr. 
'/■ 
o 
0-32 
101-04 
•000044 
•005361 
7-04 
101-08 
■000048 
■004923 
7-04 
100-99 
•000048 
•004923 
14-09 
101-02 
■000051 
•004524 
14-11 
100-95 
•000051 
•004520 
21-26 
100-87 
■000055 
■004172 
21-36 
100-82 
•000055 
•004167 
28-39 
100-73 
•000059 
■003860 
28-34 
100-69 
•000059 
■003862 
35-44 
100-45 
■000062 
■003588 
35-41 
100-40 
•000062 
•003583 
42-44 
100-33 
■000066 
■003342 
42-54 
100-30 
•000066 
•003343 
48-70 
100-28 
■000069 
■003152 
48-75 
100-20 
•000069 
■003146 
55-93 
100-21 
■000073 
■002945 
55-91 
100-13 
•000073 
•002944 
63-74 
101-32 
■000078 
•002751 
63-75 
101-25 
•000078 
•002750 
70-36 
101-28 
■000081 
■002596 
70-16 
101-16 
•000081 
•002595 
76-28 
101-11 
■000085 
■002464 
76-23 
101-09 
•000085 
•002466 
In reducing the observations we have adopted the value d (0°/4°) = 0*8296 for the 
density, and the expression 
