and 



Diffusion of Liquids. 

 These values correspond to (| solutions) 



0*0429 gram. BaN 2 6 in 24 hours, 

 0-0294 gram SrN 2 6 in 24 hours. 



419 



Diffusion of wKN0 3 . 

 Time. Amount diff. 



9-12 -0077 gram. 



12-3 -0071 



3-8 a.m. -0450 



8-4 -0199 



4-10 a.m. -0494 



10-3 -0124 



54 hours. 



1415 



Diffusion of n KH 4 K0 3 . 



Time. Amount diff. 



4-8 A.M. 



8—2 



2-5 -0065 



5-9 a.m. -0358 



9-4 -0161 



•0360 gram. 

 •0144 



48 hours. -1088 



The first corresponds to -0026 gram per hour; another 

 series of experiments gave -0025 gram per hour. The mean 

 of these two corresponds to 



0-0614 gram KlSr0 3 in 24 hours. 



The second corresponds to '00227 gram NH 4 N0 3 per hour, 

 or to 



0-0544 gram NH 3 N0 4 in 24 hours. 



Normal solutions of NaN0 3 and LiN0 3 gave quite constant 

 results at the rate of 



and 



0*0446 gram NaN0 3 in 24 hours, 

 0-0353 gram LiN0 3 in 24 hours. 



This LlNT0 3 was prepared from Mg-free Li 2 C0 3 . This was 

 digested a number of times with hot water, and after filtering 

 and drying was found to contain but the merest traces of 

 Na 2 C0 3 , as shown by the spectroscope. The Li 2 C0 3 was 

 then converted into nitrate. 



Diffusion of Sulphates. 



71 



Six different salts of this class, each in x solution, were in- 

 vestigated as to their rates of diffusion. An accurate titration 

 of the diffused salt was, of course, impossible in this case ; and 

 weight analyses were resorted to. 



At first the liquid obtained in three or four hours from the 

 tubes was evaporated in glass vessels to a small bulk and then 



