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CL. TETANI IN OPERATING-THEATRE AIR BsIrnJouRNAL TABLE I.-Cl. tetani in Samples of Air (690 cubic feet-19.5 cubic metres) Samples Toa Place Yielding Samples Days Cl. tetani Road 24 (89%) 27 9 Operating theatre (exhaust-ventilated). .. 33 (65%) 50 14 Burns dressing station (plenun-ventilated) 0 23 8 TABLE II.-Cumulative Results of Sampling for Cl. tetani on Six Days in Road, Operating Theatre, and Dressing Station Volume Corresponding Proportion of Samples Yielding Cl. tetani of Volume of

The evidence that systemic lupus erythematosus (S.L.E.) is a complex disease developing as a result of an auto-immune process is based on the finding in the serum of abnormal antibody-like globulins which can be shown to react with the patient's own blood cells and certain plasma constituents, and presumably result from the activity of immunologically-competent cells. Factors with affinity for nuclear antigens are prominent among the many abnormal proteins so far identified.