496 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
The published determinations of the density of carbon dichloride are very discrepant, 
owing, doubtless, to the difficulty of obtaining this substance pure. Two determi¬ 
nations of the sample used by us gave at 0° the values 1 •65514 and 1’65505, the mean 
of which (l‘655i) has been employed in the reductions. 
For the thermal expansion we have adopted Pierre’s observations (‘Annales de 
Chim. et de Phys.’ (3), 33, 233). 
Taking 
= -011330 ->73 = ‘003901 (calculated) = ‘006648 
— 0'^‘43 ^3 = 117°‘09 (from curve) = 49°‘32, 
we obtain the formula 
30-656 
~ (126-17 -I- ' 
which gives the following calculated values ;— 
IMean temp. 
']■ 
Difference. 
Observed (mean.) 
Calculated. 
0 
0-43 
•01133 
•01133 
•00000 
11-24 
•00986 
•00991 
*00005 
22-.30 
•00869 
•00874 
-t- -00005 
32-34 
•00784 
•00785 
+ -00001 
42-78 
•00707 
•00707 
•00000 
52-68 
•00645 
•00645 
•00000 
64-14 
•00585 
•00582 
- ^00003 
74-67 
•00536 
•00533 
- -00003 
85-75 
•00491 
•00489 
- -00002 
95-60 
•00455 
•00454 
- -00001 
106-03 
•00422 
•00421 
- -00001 
117-09 
■00390 
•00390 
•00000 
Sulphur Compounds. 
Carbon Bisulphide. CS 3 . 
A sample from Dr. Perkin, after digestion with phosphoric oxide, was distilled. 
It boiled between 46°-63 and 46°-68. Bar. 766-0 millims. Corrected and reduced 
b.p. == 46°‘42. 
Vapour density : 
Found, 37‘59. 
Calculated, 38-00. 
