2 McBAIN 



tion of Professor W. Lash Miller I decided to compile a syste- 

 matic summary of the existing data. I take this occasion of 

 expressing to him my sincerest thanks for this suggestion, and 

 for his valuable advice as to the arrangement of the results ; and 

 I desire also to acknowledge my indebtedness to the Carnegie 

 Institution of Washington for the grant under which I was 

 working. 



The compilation was far advanced before I left Toronto, and 

 the whole has been revised and brought up to date in Leipsic 

 and Heidelberg. My thanks are due to Professor Luther for 

 the interest he has displayed in the work, and to Professor Jahn 

 for his kindness in furnishing me with out-of-print dissertations 

 from his laboratory. 



To make this collection has cost me many months of labor 

 extended over the past three years ; but any doubt of its useful- 

 ness is removed by the frequency with which I still chance on 

 memoirs whose titles give no indication that they contain experi- 

 ments on electrolytic migration. 



PLAN OF THE BIBLIOGRAPHY. 



My object is to present the results in tabular form, with 

 enough of the experimental details to enable the reader to esti- 

 mate the intrinsic value of the measurements. Hence in addi- 

 tion to the author, title, year, volume and page of the periodical 

 in which the papers appeared, I have given in each case a full 

 list of the chemicals experimented with, the concentrations of 

 the solutions, the composition of the solvent, the nature of the 

 electrodes, the amount of electrolysis (voltameter readings), the 

 temperature, the change in the middle (supposedly unaltered) 

 portions, the diaphragms employed if any, the number of experi- 

 ments, and the final results ; also some information as to the 

 form and size of the apparatus, and occasional critical remarks. 



The material is arranged chronologically'; an alphabetical 

 index of authors, an index of chemicals, and an index to ex- 

 periments made in solvents other than water, are provided. In 

 the majority of cases, however, I have not stated the method of 

 analysis employed, nor given the duration of the experiments 

 (chance for diffusion). 



'Alphabetically within the year. 



