Mr. T. Graham on Liquid Diffusion applied to Analysis. 215 



It is curious to observe the effect of changing the liquid at- 

 mosphere in which diffusion takes place, which is water in all 

 these experiments, and replacing it by another fluid, namely 

 alcohol. Two substances were diffused in the usual manner, 

 but with this difference, that the substances were dissolved in 

 alcohol, and the solutions placed under a column of the same 

 liquid in the jar. The alcohol was of sp. gr« 0'822 (90 per 

 cent.). 



Table V. — Diffusion in Alcohol of 10 per cent, solutions of 

 Iodine and of Acetate of Potash in seven days. 



No. of stratum. 



Iodine at 14°. 



Acetate of potash, 

 at 14° to 15°. 



1 



•028 



•055 



2 



♦033 



•057 



3 



•046 



•061 



4 



•038 



•063 



5 



•037 



•064 



6 



•039 



•066 



7 



•081 



•070 



8 



•143 



•071 



9 



•263 



•072 



10 



•417 



•095 



11 



•637 



•285 



12 



•936 



•619 



13 



1-235 



1-157 



14 



1-506 



1-907 



15 and 16 



4-561 



5-358 





10-000 



10-000 



Table V. bis. — Diffusion in Alcohol of a 10 per cent, solution 

 of Resin, for seven days, at 14° *5. 



No. of stratum. 



Diffusate, in grammes. 



1 



•017 



2 



•017 



3 



•018 



4 



•017 



5 



•019 



6 



•020 



7 



•022 



8 



•024 



9 



•025 



10 



•080 



11 



•210 



12 



•498 



13 



•992 



14 



1-700 



15 and 16 



6341 





10-000 



