BRImH 725 MEDICAL JOURNAL negative. His temperature remained high, and he developed a slight cough and a mild gastro-intestinal upset. On July 25 he was given a short course of chloramphenicol, and appeared completely cured in three days' time. It was not until I had read the above-mentioned article that the possibility of psittacosis came to my mind, as the patient's father kept a number of racing pigeons, which were roosting outside his bedroom window. A further sample of blood was taken and

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... ent to the department of bacteriology, the London Hospital; the serum from this gave a positive reaction to psittacosis antigen, dilutions up to 1 in 32 showing complete fixation, and at 1 in 64 and 1 in 128 partial fixation. Unfortunately, no serum remained from the original sample taken on the second day of the illness with which to compare this result. No other member of the household has had any similar illness, and none of the pigeons has shown any sign of disease.-I am, etc., Chester.