. American X-ray journal . Fig. h tographic plate was not under-exposedat a 15-seconds exposure. An induction coil giving a 12-inchspark can be easily calibrated for aWehnelt interrupter. Choose a size of The skiagraph, (Fig. 1). shows twogall stones and an enlarged spleen. Asuccessful operation confirmed the rad-iographic findings. Case 2. J. B., female^jj^years old, COLLEGE Qf pgjye 1105 THE AMERICAN X-RAY THE AMERICAN X-RAY JOURNAL. 1106

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectxrays, bookyear1902