I have already1 reported 8 cases of an infectious disease hitherto undescribed in text-books or the literature. Since contributing that study, through the kindness of the authors, I have found two articles which report an analogous fever.2 These reports, however, are very obscure and incomplete. They make no mention of important tests in order to exclude the various well known fevers, typhoid, etc. The cases of Dr. Sheffield occurred among children and in epidemic form. There are many points in common both in Dr. Sheffield's and Dr. Happel's cases, yet the data are so very much obscured and faulty that more complete reports must be made before these cases can be all identified as the disease reported here.
Through the kindness of many of my colleagues, I am enabled in the following study to report on eleven histories of similar cases in addition to the nine of my