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"An apparatus used to determine pressures beyond those that the McLcod gauge can discern." —The Encyclopedia Britannica 1910

Radiometer

"An apparatus used to determine pressures beyond those that the McLcod gauge can discern." —The…

"Configuration used to wash out a radiometer using oxygen. A, bulb containing perchlorate of potash; B, charcol; C, radiometer; D, outlet; E, used for examing the gas given off." —The Encyclopedia Britannica 1910

Washing Out a Radiometer

"Configuration used to wash out a radiometer using oxygen. A, bulb containing perchlorate of potash;…