The flood of organic preparations of the various metals introduced into therapeutics during the past few years has carried with it a considerable number of organic preparations of the non-metallic elements, chiefly the iodids and bromids. The advantages of these preparations over the older inorganic combinations have in general not been carefully considered by the makers or users, but the popularity earned by the organic preparations of arsenic and mercury has led manufacturers to seek new fields of endeavor. In a previous communication1 I reviewed the evidence regarding the various organic iodin preparations on the market. Since that time some new evidence has been brought forward, and a summary of our knowledge at the present time seems desirable.
The larger number of commercial preparations resolve themselves naturally into two classes: (1) iodin products of the higher fats or fatty acids and (2) iodized albumins. These two classes are so