The best way to review this excellent book is to reproduce the Foreword, by Dr. Edith L. Potter, as follows:
"It is a rare and intensely satisfying experience to find a book that is exactly what you would like to have been able to produce yourself. No matter how well someone else's manuscript is written there are almost always parts with which you disagree or which you think you might have done better, but in this one I found myself invariably agreeing and admiring.
"Dr. Diamond and Dr. Allen have accomplished a remarkable feat. They have taken a complicated subject with a voluminous literature and have managed to give the reader in relatively few pages a clear, unbiased picture of the current status of erythroblastosis and the blood factors by which it is caused. They are well fitted for this task because of their long interest and experience in the