Note 5 — Chapter IV · DANGERS OF BLOOD TRANSFUSION

The notation used here is that initiated by Moss in 1910. This does not agree with the notation introduced three years previously by Jansky, the Groups I and II of Moss corresponding to the Groups IV and III of Jansky and vice versa. The difference has given rise to confusion and some disasters, and it has been recently recommended by an American Medical Committee that the notation of Jansky be universally adopted on grounds of priority. This decision is no doubt fully justified in American practice, but in this country the notation of Moss has been so generally used that I have not attempted to reverse it. The possible dangers that may arise should, however, be realized.