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Title: Glass negative of electrocardiograph trace, 1915-1925 [Go to resource]
Description: Glass negative of ECG trace thought to be from ECG machine by the Cambridge Instrument Co. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: glass negative Temporal: 1935-1945 Source: Science Museum Creator: Cambridge Instrument Company Limited Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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