between the viscosity of liquids and their chemical nature. 471 
Mean temp. 
>h 
Difference. 
Observed (mean). 
Calculated. 
O 
0-45 
-01154 
-01154 
•00000 
11-23 
-00978 
-00987 
+ -00009 
22-44 
-00844 
-00852 
+ -00008 
33-84 
-00739 
-00742 
+ -00003 
44-56 
-00658 
-00658 
•00000 
54-65 
-00593 
-00592 
- -00001 
65-11 
-00536 
•00534 
- -00002 
77-33 
-00480 
•00477 
- -00003 
86-83 
-00442 
•00440 
- -00002 
• 97-84 
-00403 
•00402 
- -00001 
109-20 
-00368 
•00367 
- -00001 
116-07 
-00349 
•00349 
•00000 
Allyl Iodide. CHaiCH.CHJ. 
A quantity of allyl iodide, made by the method of Tollens and Henninger 
(‘Annalen,’ 156, 134), which boiled between 102°‘5 and lOS'^'O, was shaken with a 
small quantity of mercury and distilled; the greater portion was found to boil 
between 102°'05 and 102°'55. Bar. 7477 millims. Corrected and reduced 
b.p. = 102'’79. The distillate was next treated with “molecular” silver and re¬ 
distilled under diminished pressure [circa 190 millims.) immediately before its 
introduction into the glischrometer. 
The observations for viscosity gave :— 
Left limb. 
Ri, 
3 ’ht limb. 
Temp. 
Press. 
Corr. 
Temp. 
Press. 
Con-. 
>h 
0 
0-34 
102-61 
•000059 
i 
•009253 
O 
0-32 
102-37 
-000059 
•009262 
9-36 
102-64 
•000065 
•008239 
9-31 
102-45 
-000065 
•008266 
16-82 
102-61 
•000071 
•007530 
16-73 
102-41 
•000070 
•007548 
26-16 
102-65 
•000078 
•006782 
26-08 
102-45 
•000077 
•006798 
35-76 
102-66 
•000085 
•006132 
35-78 
1U2-48 
•000085 
•006139 
44-16 
102-17 
•000090 
•005647 
44-20 
101-98 
•000091 
•005648 
55-17 
102-11 
•000099 
•005093 : 
55-15 
101-93 
•000099 
•005101 
63-43 
102-09 
•000104 
-004773 1 
63-45 
101-91 
•000104 
•004742 
71-16 
102-14 
•000111 
•004436 i 
71-13 
101-93 
•000111 
•004435 
81-31 
102-22 
•000118 
•004113 j 
81-28 
102-03 
•000118 
•004083 
91-83 
98-45 
102-24 
102-26 
•000127 
•000131 
-003750 
•003584 : 
i 
91-90 
102-04 
•000127 
•003748 
In reducing the observations, we employed the value cZ (0^/0°) = 1'8696 for- the 
relative density, and the expression 
