BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE. 545 
Mean temp. 
V- 
Difference. 
Observed (mean). 
Calculated. 
1 o 
0-24 
-084610 
•084610 
•000000 
11-91 
•056249 
•056276 
+ -000027 
23-83 
-038633 
•038475 
- -000158 
34-25 
-028303 
•028303 
•000000 
47-G6 
-019654 
•019654 
•000000 
58-74 
-014847 
•014881 
+ -000034 
71-05 
-011210 
•011200 
- -000010 
81-87 
-008888 
•008888 
•000000 
94-94 
-006872 
•006885 
+ -000013 
104-57 
-005795 
•005793 
- -000002 
117-60 
-004654 
•004669 
+ -000015 
128-10 
•003974 
•003974 
•000000 
Dimetlujl Ethyl Carhinol. (CH 3 ) 2 C(OH).CH 2 .CH 3 . 
Received from Dr. Perkin. After standing over dehydrated copper sulphate for 
five months it was found to boil between 101°’62 and 102°'52. Bar. 766*9 millims. 
Corrected and reduced b.p. = 101°*81. 
Two determinations of its vapour density gave the following results :— 
I. _ II. 
Weight of liquid. 0*0478 grin. 0*0476 grm. 
Volume of vapour. 75*02 c.c. 74*36 c.c. 
Temperature.. 99°*18 99°*22 
Pressure.179*8 millims. 179*0 millims. 
Found, I. 41*00 ; II. 41*37. Calculated, 44*00. 
In spite of the prolonged treatment with copper sulphate the liquid was evidently 
not completely dehydrated. 
The observations for viscosity gave the following results :— 
4 A 
mdcccxciv.—A. 
