A^VsMv^W^^^■^%'^''^"'?«<^ Joule o« \ 

 Yet there is nothing extravagant in the idea that water 

 combined with a salt may have a volume different from that of 

 ice. Indeed, we are inclined to l>e of the opinion that ice 

 itself represents nearly the mean of the volume of water un- 

 combined and that of combined water. Be this as it may, it 

 will be observed, as we proceed, that the number 11 is the 

 best exponent of one class of our experiments on specific gra- 

 vity ; and therefore, without resting its claims to acceptance 

 entirely on the present experiments, we assume it in the fol- 

 lowing tables as the theoretical result for each class of salts. 

 With these views we tabulate the experiments whicU ba»ve 

 been already detaned. ijr^; .. (>;> 



Table II. — Showing the volumes occupied by cer^ain'"saits 

 containing a large amount of hydrate water. 





Name. 



0(^ -gnhd 9iirJRp9tTrr! 



,q8 ^' 



H2S-r ... 0-082 



Atomic 

 Weight. 



Volume in solution, 



il 



■^ o 

 B =s 



> g 



, V ! ri Volunje 98 «ajt. 



3 S 



> o 



•I I 





Sulphate of ] 



copper...... J 



Sulphate ofl 



alumina .... j 

 Sulphate of 1 



soda / 



Biborate of"! 



soda ...... J 



Chloride of| 



strontium . J 

 Chloride ofl 



calcium .... J 

 Chloride Qf,l 



magnesium. J 



CuO, SO3+5HO 



AlgOa/sSOs-i-isHO 



NaO, SOa+lOHG 



NaO,2BO3+10HO 



SrCl+6H0 



CaCl+6H0 



MgCl+6H0' 



124-88 



3337 



161-48 



191-23 



133-33 



109-92 



102-16 



11! 



45- 

 159-6 

 91-6 

 91-7 

 53-3 

 55-6 

 560 



45 

 162 

 90 

 90 

 54 

 54 

 54 



55-4 



199-6 



109-9 



110-5 



66-1 



65-5 



65-4 



55 



198 



110 



110 



66 



66 



66 



2-270 

 1-685 

 1-468 

 1-738 

 2020 

 1-665 

 1-548 



2-254 

 1-671 

 1-469 

 1-730 

 2-015 

 1680 

 1-562 



There are some salts which do not take up any space in 

 solution, except that due to their water, but which assume a 

 volume due to one of their constituents on becoming solid ; 

 the potash and ammonia alums are examples of this class. 



Sulphate of Alumina and Potash, ^\^a SSOg + KO SO3 

 + 24HO = ^T^'S^r— 59 grains of alum dissolved in 1000 

 grains of water, gave the increa.se of 27*0 in one experiment 

 and 27'1 in another, both at the temperature of 60°. 

 J^,^ Ajpiifi, vplume in solution 21 7*3 



jiU .i^rii 



Mh n? 



Mean 



218-1 

 217-7 



..,..vIO 



