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Genre Business correspondence Remove constraint Genre: Business correspondence Language English Remove constraint Language: English Format Text Remove constraint Format: Text Subject World War (1939-1945) Remove constraint Subject: World War (1939-1945) Subject Scientific apparatus and instruments Remove constraint Subject: Scientific apparatus and instruments Subject Moisture meters Remove constraint Subject: Moisture meters

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    • 1945-Feb-06

    In this letter, Dr. Prentiss inquires about the possibility of combining a moisture detector and an oxygen meter, presumably for use in submarines. At the time, Dr. Spencer S. Prentiss was working for the National…