SPECIFIC GRAVITY AND DISPLACEMENT OF SOME SALINE SOLUTIONS. 7 



PAR. PAGE 



51-52. Tables I. to XVIII. illustrate the method of arriving at the volumetric effect produced 123 



by changing the concentration of solutions of each of the salts of the two enneads. 



53. Summary table giving the volumetric effect j^roduced on changing the concentration of 129 



certain solutions of these salts. 



54. Remarks on the tables referring to solutions of the salts MR. 129 



55. Remarks on the tables referring to solutions of the salts MRO3. 131 



SECTION IX. 



Notes on the Values of v for the Enneads MR and MRO3. 



5G. Tables I. and II. give details regarding the change of displacement in solutions of salts of 132 



the ennead MR when changes are effected in the metal or the metalloid of the salt. 



57. Tables III. and IV. give corresponding values for solutions of salts of the ennead MRO3. 134 



Table V. gives corresponding differences between the value of v in solutions of salts of 

 the ennead MRO3 when RO3 is replaced by R. 



58. Remarks on the tables relative to solutions of the ennead MR. 135 



59. Remarks on the tables relative to solutions of the ennead MRO3. 137 



60. Consideration of the effect produced on their solutions by the addition of the three oxygen 139 



atoms to the salts of the halides to form the corresponding salts of the oxyhalides. 



61. A general comparison and summary of the variation in the values of the mean increment of 139 



displacement for dilute solutions of salts of the two enneads MR and MRO3. Diagram 

 illustrating the variation of v/m with m for values of m= 1/32 to 1/512. 



62. The eighteen salts of the double ennead (MR, MRO3) can be divided into three hexads, 142 



the members of each hexad containing a common metallic element K, Rb or Cs, and 

 into three other hexads having a common nietalloidal element CI, Br or I. The relation 

 between the values of v/m and m for the three hexads having the nucleus CI, Br or I 

 for solutions 1/32 gram-molecule of salt and under are represented graphically in the 

 diagram in §61. 



63. Consideration of the order in which the salts of each hexad follow each other when 142 



arranged in ascending order of v/m without paying attention to their numerical values. 

 Graphic representation of each hexad of salts by a hexagon, the centre of which is 

 occupied by the common element, metal or metalloid, as nucleus. The angles of the 

 hexagon are supposed to be occupied by the residues of the salt after the abstraction of 

 the common element, arranged in ascending order of magnitude of v/m, the lowest value 

 occupying the lowest angle on the paper, and the other values occupying the other 

 angles seriatim in ascending order of magnitude and going round from left to right. 

 Inside each hexagon we have the common element M or R, and above it the value of ?n 

 for the particular concentration. For concentrations higher than m = 1/64 the arrange- 

 ment of residues is the same as that given for m = 1/64 in the six hexagons corresponding 

 to the common elements CI, Br, I, K, Rb, Cs. The hexagon corresponding to the 

 nucleus R and concentration m is represented by the symbol m [R], as, for example, 

 1/64 [CI]. The residues of the hexad after the abstraction of the common element CI 

 are K, Rb, Cs, KO3, Rb03, CsOg, and these residues, in conformity with the values of 

 v/m which correspond to them, follow each other in this order round the corners of the 

 hexagon considered. 



64-66, Twelve hexagons of type m[R] and twelve of type ?;i[lVI] are given in the text, and the 144 



different ordinal sequences of the residues for different hexads as exhibited in the 

 hexagons are fully discussed. 



