472 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
V = 1 + 0-03l0539« + 0-0e63572«2+ 0-0710030^3 
given by Zander (‘Annalen/ 214, 146) for the thermal expansion. 
Taking 
rjt = -009257 >73 = -003749 
= 0°-33 ^3 = 91°-86 
we obtain the formula 
28-411 
~ (126-05 + 0“ ’ 
173 (calculated) = -005891 
U (from curve) = 39°"90, 
Avhich affords the following calculated values :— 
Alean temp. 
V- 
Difference. 
Observed (mean). 
Calculated. 
0 
0-33 
-00926 
•00926 
■00000 
9-33 
-00825 
•00826 
+ -00001 
16-77 
•00754 
•00756 
+ -00002 
26-12 
-00673 . 
•00680 
+ -00001 
35-77 
-00614 
•00614 
•00000 
44-18 
-00565 
•00565 
•00000 
55-16 
-00510 
•00509 
- -00001 
63-44 
-00476 
•00473 
- -00003 
71-14 
-00443 
•00443 
•00000 
81-29 
•00410 
•00407 
- -00003 
91-86 
•00375 
•00375 
•00000 
98-45 
•00358 
•00357 
- -00001 
Bromides. 
Eihijl Bromide. CH 3 .CHoBr. 
A sample made by tlie action of bromine and phosphorus on alcohol, after drying 
over phosjdioric oxide and rectifying, boiled between 38°-23 and 38°'58. Bar. 704-9 
ndllims. Corrected and reduced b.p. = 38°-22. 
Vapour density : 
Found, 54 - 50 . Calculated, 54-5. 
Observations for viscosity ;— 
