To the Editor.
—In your issue of Dec. 27, 1930, there appeared a review of my book, "Handbook of the Vaccine Treatment of Chronic Rheumatic Diseases." I am grateful that you should accord me the space to correct certain misquotations and misleading statements which give a wrong impression. I do not wish in any way to blame your reviewer for not having read the book with more care. To him, it may have seemed too insignificant to be worthy of much consideration. Nevertheless, I am sure he will concede that to state that the author "considers a differential diagnosis of no especial importance, as the same treatment is given to the various forms" (of chronic rheumatic diseases) without presenting the context, which lays the greatest stress on the prodromal signs of rheumatoid arthritis so that treatment may be instituted in the earliest stage, is not altogether fair. The following statement