Mr. T. Graham on Liquid Diffusion applied to Analysis. 213 



in these substances. Such a chronological progress of diffusion 

 in a particular substance becomes a standard of comparison for 

 siDgle experiments on the diffusion of other substances. The 

 substances selected were chloride of sodium and cane-sugar. 



Table III. — Diffusion of a 10 per cent, solution of Chloride of 

 Sodium in different times. 





In 4 days, 



In 5 days, 



In 7 days, 



In 14 days, 





at 9° to 10°. 



at ll°-75. 



at 9°. 



at 10°. 



1 



•004 



•004 



•013 



•104 



2 



•004 



•006 



•017 



•129 



3 



•005 



•011 



•028 



•162 



4 



•011 



•020 



•051 



•198 



5 



•023 



•040 



•081 



•267 



6 



•040 



•075 



•134 



•340 



• 7 



•080 



•134 



•211 



•429 



8 



•145 



•233 



•318 



•535 



9 



•261 



•368 



•460 



•654 



10 



•436 



•589 



•640 



•766 



11 



•706 



•762 



•850 



•881 



12 



1-031 



1-090 



1-057 



•991 



13 



1-416 



1-357 



1-317 



1-090 



14 



1-815 



1-697 



1-527 



1-187 



15 and 16 



4-023 



3-613 



3-294 



2-266 





10-000 



9-999 



9-998 



9-999 



Table IV. — Diffusion of a 10 per cent, solution of Cane-sugar 

 in different times. 



No. of 



In 1 dav, 



In 2 days, 



In 6 days, 



In 7 davs, 



In 8 days, 



In 14 days, 



stratum. 



atl0°-75. 



at 10°. 



at 9°. 



at 9°. 



at 9°. 



at 10°. 



1 







•001 



•002 



•002 



•005 



2 







•002 



•002 



•003 



•008 



3 







•002 



•003 



•003 



•012 



4 







•002 



•004 



•004 



•016 



5 







•003 



•004 



•007 



•030 



6 







•005 



•007 



•012 



•059 



7 







•011 



•020 



•031 



•102 



8 



•002 



•002 



•024 



•051 



•072 



•180 



9 



•002 



•008 



•071 



•121 



•154 



•305 



10 



•005 



•027 



•170 



•260 



•304 



•495 



11 



•024 



•107 



•376 



•507 



•555 



•740 



12 



•133 



•344 



•727 



•897 



•858 



1-075 



13 



•597 



•930 



1-282 



1-410 



1-365 



1-435 



14 



1-850 



1-940 



1-930 



1-950 



1-955 



1-758 



15 and 16 



7-386 



6-641 



5-392 



4-760 



4-674 



3-783 





9999 



9-999 



9-998 



9-998 



9-999 



10-003 



The scheme of the diffusion of the chloride of sodium may 

 afford terms of comparison for the metallic salts, acids and other 

 highly diffusible substauces, while the scheme of sugar will be 



