450 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
Bromine. 
About 000 gnus, of “ pure ” bromine were repeatedly shaken with pure oil of 
vitriol during four days. It was then separated from the acid and distilled in a 
reflux condenser, made entirely of glass, with piu’e ])otassium bromide, for eleven 
days. The product was next distilled into a bottle and treated with phosphoric oxide 
for four days. On siphoning off the bromine from the phosphoric oxide it was found 
to boil absolutely constantly at 58°‘81. Bar. 756'3 millims. Corrected and reduced 
b.p. = 58°'91. 
The observations for viscosity gave :— 
Left limb. 
Right limb. 
Temp. 
Press. 
Corr. 
'/• 
Temp. 
Press. 
Corr. 
’]■ 
0 
O'oo 
130 20 
-000094 
•012433 
0 
0-58 
1-29-78 
-000094 
•012461 
5-.38 
129-94 
-000099 
•011710 
5-25 
129-65 
-000099 
•011754 
10-46 
129-93 
-000105 
•011027 
10-44 
1-29-59 
-000105 
•011047 
16-18 
129-93 
-000111 
•010347 
16-14 
129-57 
-000111 
•010362 
21-09 
129-94 
-000116 
•009822 
21-05 
129-60 
•000116 
•009838 
25-98 
129-92 
-000121 
•009332 
26-00 
129-57 
•000121 
-009346 
31-18 
129-33 
-000126 
•008880 
31-22 
128-99 
•000126 
•008884 
35-81 
129-40 
-000131 
•008483 
35-92 
1-29-04 
•000131 
008486 
40-95 
129-44 
-000136 
•008084 
40-92 
129-11 
•000136 
•008107 
46-19 
130-33 
•000143 
•007715 
46-20 
130-00 
•000143 
•007723 
50-30 
130-31 
•000148 
•007431 
50-27 
130-02 
•000147 
•007442 
50-44 
130-32 
•000154 
•007049 
56-38 
129-99 
•000154 
•007065 
In reducing the observations we have employed the value c?(0”/4°) = 3T8828 for 
the density, and the expression 
V = 1 + 0-03lOG218^ + 0-05187714^^ - 0-0s3085^3 
for the thermal expansion. 
By taking 
= -012447 
= 0°-5G 
(Thorpe, ‘ Chem. Soc. Trans.,’ 1880, 172.) 
=: -007057 773 (calculated) = -009372 
^3 = 5G°-41 C (from curve) = 25°-G8, 
we obtain the formula 
9-G002 
~ (111-92 + ’ 
by means of which the calculated values in the following table are obtained :— 
