Eosinophilia, referable to drugs, has been described. von Noorden reports two cases of chlorosis in which there was an eosinophilia of 9 per cent, after the internal administration of camphor. It has been reported as occurring in animals after the inhalation of carbon dioxid. Wood mentions a case in which the cosinophiles reached 14 per cent. in a vesicular eruption brought about by the internal administration of potassium iodid. Boston states that it may follow phosphorus poisoning, and, according to Taylor, after the use of nuclein and pilocarpin. It was noted by us that in patients taking potassium iodid there was a rather high percentage of eosinophiles in the blood.
It occurred to us to try the effect of potassium iodid on the number of eosinophiles normally found in the blood.
In testing the effect of potassium iodid on the blood we selected patients suffering with fractures, contusions, etc.