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Language English Remove constraint Language: English Creator Tallqvist, Theodor Waldemar, 1871-1927 Remove constraint Creator: Tallqvist, Theodor Waldemar, 1871-1927 Rights Public Domain Mark 1.0 Remove constraint Rights: Public Domain Mark 1.0 Subject Blood Remove constraint Subject: Blood Subject Hemoglobin Remove constraint Subject: Hemoglobin Date 1906 to 1907 Remove constraint Date: <span class='from'>1906</span> to <span class='to'>1907</span>

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    • 1900 – 1920

    Developed circa 1900 and often called the Tallquist Method, it is used to compare a patient's blood color to a chart of red colors to diagnose possible anemia. The method is still used when more sophisticated equipment…