22 



Mr. William Sutherland on the 



Table XIV.— Type RC1 2 (continued). 



T 



M/p.... 



T 



M/p . 

 (M 2 /)* 



T 



M/p.. 

 (M 2 /)' 



Cl 2 . 

 561 



50-0 



64 



Cl 2 . 

 707 

 557 

 74 



Cl 2 . 

 769 



47-8 



7-4 



Hg. 



Br. 



517 

 62-7 

 71 



Cu 2 . 

 Br 2 . 



780 

 60-5 



8-4 



Pb. 



Br r 



769 



55-2 

 81 



I 2 . 



514 



724 



77 



I 2 . 



874 



863 

 108 



T 2 . 



653 

 755 



8-9 



I 2 - 



Hg 2 . 



Br 2 . 



678 562 



766 85-1 



94 90 



CI* 

 724 



25-8 



50 



Ag. 



Br.* 

 700 



29-7 

 5-4 



CuCl 2 . 

 773 



44-0 



6-7 



800 



41-8 



69 



For the haloid compounds of other metals data are available 

 for the boiling-point as well as for the melting-point, so that, 

 besides the equation (9) relating to the melting-point, we can 

 use the approximate equation (" Laws of Molecular Force," 

 p. 247) 



M 2 /= 1190x10-^^ .... (14) 



relating to the boiling-point T&, and so obtain two sets of 

 values for (M 2 Z)% which are given in the next table along with 

 their ratio (v } is strictly the volume of a gramme at Ts, but 

 the value of \/p at 0° C. can be taken as a good enough 

 approximation). 



Table XV. (Types RC1 3 and RC1J. 



B. 



T 

 T 



Cl 3 . 

 210 



b 



M/p 



(M 2 Z)*from(9).. 

 (M.H)i from (14) 5-5 

 Ratio 114 



290 

 87 

 4-8 



Br 3 . 

 270 



363 

 93 

 6-1 

 63 

 103 



Al. 





0. 





Br 3 . I 3 . 



CI,. 



Br 4 . 



h 



363 398 



... 



364 



420 



533 623 



351 



462 



... 



105 155 



94 



98 



120 



75 99 



... 



74 



91 



8-1 10-7 



63 



73 





108 108 





0-99 





* See footnote preceding page. 



