﻿96i 



Mr. J. Kendall on the Solubility of 

 Calcite. 



Temperature. 



Time before 

 filtration. 



G-rs. per litre 

 dissolved. 



Mean 



result. 



Kohlrauscb. 



25° C 



50° C 



100° C 



1 day i -0142S 1 '01440 1 



2 days — I -01433 / 



3 days -01431 J — 



1 dav -01507] -015061 

 2dnvs -01491/ — I 

 3 days — -01513 J 



40 mins. (-01816) '01785 — 



60 mms. ('01819) '01770 -01777 



80 mins. (-01810) '01776 — 



120 mins. ('01804) '01785 '01780 



01433 

 •01504 



•01779 



•014 

 •016 



Arragonite. 



Temperature. 



Time before 



Grs. per litre 



Mean 



Kohlrausch. 





filtration. 



dissolved. 



result. 





25°0 



6 days. 



(•01075)1 — 



(•01286) ] — 









10 days. 









6 days * 



(•01511)1 — 



•01528 



•016 





10 days.* 



•01524 -015301 

 •01522 J -01536/ 









12 days * 







50° C 



3 clays. 



(•01206) 1 — 

 (•01572) f — 









6 days. 









3 days.* 



(•01608)1 — 



•01617 



•018 





6 days.* 



•01616 I -01611 1 

 •01616 J -01624/ 









8 days.* 







100° c 



60 mins. 

 120 mins. 

 180 mins. 



(•01178) — 

 (•01660) — 

 •01926 — 









60 mins.* 



•01901 -01800 



•01902 



— 





120 mins.* 



•01919 -01898 









180 mins.* 



•01902 -01879 







The results for calcite at 100° C. that are placed between 

 brackets are those obtained with the tin tube ; although they 

 agree well together, they are slightly higher than those 

 found when using the silica tube, and are not employed in 

 the calculation of the mean value. The results which are 

 bracketed together are those obtained from experiments with 

 successive portions of the same solution at different times ; 

 by this means it could be ascertained when the final solubility 

 value had been reached, in the case of solutions only slowly 

 attaining equilibrium. 



