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November 24, 1934

The Chemical Laboratory

JAMA. 1934;103(21):1621-1622. doi:10.1001/jama.1934.02750470043010

THE STERILOMETER AND THE ASEPTIC-THERMO INDICATOR  Sterilometers, manufactured by the Sterilometer Laboratories, of Los Angeles, and Aseptic-Thermo Indicators, manufactured by the Aseptic-Thermo-Indicator Co., also of Los Angeles, are products designed for determining effective sterilization of certain types of materials. The products are designed for inclusion in or near the center of packages of goods for pressure-steam sterilization to determine whether or not adequate sterilizing conditions have been met throughout the depth of the material. The A. M. A. Chemical Laboratory has received several inquiries as to whether or not the products meet the claims made for them.1The Sterilometer consists of a thermometer-like drawing on a piece of cardboard, the bulb and stem of which are of a light tan color. It is claimed that after a sufficient period of subjection to steam under pressure the column will match the bulb in a uniformly black color, and that this

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