SPECIFIC GRAVITY AND DISPLACEMENT OF SOME SALINE SOLUTIONS. 15 



PAR. PAGE 



13 L Account of similar experimental researches for the crystals and mother-liquors of the salts 214 



of tlie ennead MRO3. The investigation was made on a plan exactly similar to that 

 used in the case of the salts of the ennead MR. Table IV. corresponds to Table IT. of 

 the ennead MR, and gives in a condensed form the data bearing upon the observed 

 values of the specific gravity of the salts. 



132. Table V. gives the results of observations made with the crystals and mother liquors of 214 



the salts of the ennead MRO3. It is arranged on the same plan as Table III. for the 

 salts of the ennead MR, and consists of a number of sub-tables, the nature of each of 

 which is specified in its title. 



133. Contains a table giving the specific gravities, D, of the salts of the ennead MRO3, and 215 



their differences. The observations recorded in Tables IV. and V. are further 

 discussed. 



134. The molecular displacement, MRO3/D, of the crystal expressed in grams and molecules of 218 



water is considered. 



135. The molecular concentration of the mother-liquor is discussed. The value of m does not 218 



in any case exceed 1/2. The values of the concentrations are derived from the specific 

 gravity of the mother-liquor. 



136. The values of -:- 3 -— are discussed. As they are all positive, crystallisation is in 218 



every case accompanied by expansion. 



137. In a table are given the differences between the molecular displacements in crystal of 218 



the corresponding salts of the two enneads, MRO3 and MR, and these are 

 commented on. 



138. Concluding remarks. 219 



Appendix A. — Densities of the solutions at T. 



Appendix B. — Table giving the number of series as well as the number of single 

 observations made with the various Hydrometers, from which the results recorded in 

 this Memoir were obtained. 



Index, 226 



