316 



Mr. J. A. Craw. On the Filtration of [Dec. 1, 



Continued Filtration of Sodium Chloride through 9 per cent. Gelatine. 



As the last fraction of filtrate in No. 2 did not quite reach (100), it seemed 

 desirable to ascertain whether on continued filtration this value could be 

 obtained. 



Method. — The residual fluid of No. 2, which had stood in the filter case 



Table I. 





Sodium chloride, per 



cent. 







Megatherium ly 



sin, H.Is. 



No. ... 



1. 



2. 



2a. 



2b. 



3. 



4. 



5. 



6. 



7. 



8. 



P. c. ... 



0-88. 



0-81. 



HBu. 



15. 



11. 



9. 



7-5. 



S. 





23 9 



47 -1 



101 -5 



97-4 



16 -7 



0-2 



0-7 



0-5 



o-o 



0-5 



o-o 





31 -4 



55 -1 



103 -3 



97 -8 



41 -7- 



5-8 



0-5 



o-o 



o-o 



5-0 



3-5 





39 -0 



76 -1 



99 -6 



96 -0 



47-8 



60-4 



o-o 



2 -3 



o-o 



17 -7 



10 -7 



"el 



5h 



49-0 



89 -5 



101 -1 



93 -1 



56 -9 



74-0 



o-o 



5 -1 



3-7 



25 -0 



17 -8 



53 



56 -0 



95 -3 



99 -6 



94 -2 



65 -6 



85 -4 



o-o 



5-1 



27 -8 



34 -6 



21 -4 



o 



64-1 



96 -7 



97 -6 



93 -5 



70 -6 



88 -5 



o-o 



7-1 



46 -3 



45 -1 



25 -0 



m 



71 -1 



97 -6 



100 -7 



95 -7 



76 -8 



88 -5 



o-o 



8-6 



33 -9 



48 -8 



28 -5 







_o 



76 -1 



97 -6 



97 -6 



94-2 



80-4 



90 -6 



o-o 



8-6 



47-8 



48 -8 



38 -5 



VS 

 o 



79 -2 



97 -6 





94-2 



83 -1 



90 -6 



o-o 



8-6 



47-0 



48 -8 



32 -1 





81 -7 



99 -2 





96 -0 



85 -0 



90-6 



o-o 



12 -3 



47 -0 



48 -4 



32 -1 



83 -3 



99 -6 





94 -9 



86 -3 



90 -6 



o-o 



12-8 



45 -6 



48 -4 



35 -7 



■ Eh 



112 -6 



100 -o 





96 -8 







2-3 



8-0 



47-0 



49-3 



35 -7 



IB 



<o 



107 -8 



99 -6 





96 -4 







3-7 



10 -o 



46 -3 



48 -8 



50 -0 



a 



107 -8 



99 -2 





96 -4 







10 -o 







48 -4 



50 -0 



CO 



98 -4 

 96 -2 

 93 -7 







96 -4 















50 -0 

 50 -0 





134 -9 



100-0 



100 -o 



100 -o 



110 -o 



125 -0 



85 -0 



62 -9 



55 -6 



52 -7 



67 -8 



Kes. ^ 



c.c. 



c.c. 



c.c. 



c.c. 



c.c. 





c.c. 



c.c. 



c.c. 



c.c. 



c.c. 





20 



44 



65 



40 



45 





47 



45 



34 



46 



31 





100 -o 



100-0 



100 -o 



100 



100 -o 



100 -o 



50 -0 



50 -0 



50 -0 



50 -0 



50 -0 



Orig.j 



c.c. 



c.c. 



c.c. 



c.c. 



c.c. 





c.c. 



c.c. 



c.c. 



c.c. 



c.c. 





100 



112 



112 



120 



105 





110 



105 



100 



110 



105 



overnight, was poured out, and the filter case refilled with 112 c.c. of saline, 

 of which 40 c.c. in 5 c.c. fractions were pressed through. 



Examination for Sodium Chloride. — Experiment No. 2a, Table I. 



Original Fluid : 0-81 per cent. NaCl = Orig. (100). 



Filtrates : The 1st and 2nd fractions contained (101 - 5) and (103 - 3) respec- 

 tively, and those succeeding showed values varying about (100). 



