BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE 481 
Taking 
= '022847 — *004684 173 (calculated) = •010345 
ti = 0°'36 ^3 = ISG'^'G? ^3 (from curve) = 52°’98, 
we obtain the formula 
48-803 
~ (88-757 + ’ 
which gives the following values :— 
Mean temp. 
V 
Difference. 
Observed (mean). 
Calculated. 
0 
0-36 
-02285 
•02285 
•00000 
12-91 
•01816 
•01824 
-b -00008 
25-27 
-01494 
•01499 
+ -00005 
38-02 
•01247 
•01249 
-b -00002 
50-08 
•01072 
•01072 
•00000 
63-19 
•00918 
•00919 
-b -00001 
76-46 
•00797 
•00796 
- -00001 
89-13 
•00704 
•00702 
- -00002 
101-18 
•00628 
•00628 
•00000 
11.3-71 
•00565 
•00563 
- -00002 
127-97 
•00.501 
•00501 
•00000 
136-67 
•00468 
-00468 
•00000 
Isobutylene Bromide. (CH 3 ) 3 CBr.CH 3 Br. 
A quantity of this substance, procured from Kahlbaum, \vas placed over phos¬ 
phoric oxide for some days and then distilled. It boiled completely between 148°'85 
and 149°‘60. Bar. 752'5 millims. Corrected and reduced b.p. = 149“’6. 
Before introducing it into the glischrometer, it was again distilled under reduced 
pressure, and the portion coming over between the pressures 77 and 91 millims, was 
employed for the experiments. 
The observations for viscosity were as follows :— 
Left limb. 
Right limb. 
Temp. 
Press. 
Corr. 
V 
Temp. 
Press. 
Corr. 
V 
0 
13-67 
130-.52 
•000026 
•024558 
0 
0-39 
130-25 
•000020 
•032903 
40-80 
129-97 
•000041 
•015278 
26-94 
129-83 
•000033 
•019163 
66-90 
129-84 
•000057 
•010648 
53-18 
129-73 
•000049 
•012741 
80-64 
129-63 
•000066 
•009027 
80-56 
129-53 
•000066 
•009032 
93-67 
129-57 
•000076 
■007809 
93-60 
129-40 
•000075 
•007821 
107-15 
130-52 
•000086 
•006808 
107-16 
130-37 
•000086 
•006803 
121-72 
130-57 
•000097 
•005933 
121-76 
130-38 
■000097 
•005923 
133-75 
1.30-59 
•000106 
•005321 
133-76 
130-42 
•000106 
•005322 
142-46 
130-59 
•000113 
•004946 
142-42 
130-41 
•000112 
•004936 
MDCCCXCIV.—A. 3 Q 
I 
