Conclusion. 
453 
under his supervision. I am under many obligations to him 
for his valuable suggestions and assistance and I take this 
means of acknowledging the same. 
A portion of the results of the earlier part of the work has 
previously been published by Professor Kahlenberg and myself 
jointly in a preliminary paper in the Journal of Physical 
Chemistry 3^ 12, 1899. For the sake of completeness the re¬ 
sults have also been incorporated in the present article. 
Madison, Wis., April, 1899. 
