The exasperating resistance to treatment of the disease commonly known as hay fever makes it one of the most interesting subjects to the practitioner. The great interest shown of late in the serum treatment and the present visit to this country of Dr. William Dunbar, who is a native of this country, and whose serum is being used so extensively for hay fever, make it of interest to review briefly some of the facts that have previously appeared in our own columns and in the literature on the subject.
The disease has been described under a variety of names, summer catarrh, hay fever, hay asthma, pollen catarrh, rose cold, June cold, concert fever, railroad fever, sun fever, dust fever, autumnal catarrh and peach cold. Many theories have been put forward to explain the phenomena of the affection. The pollen theory, especially supported by Blackley, was one of the earliest. The