C. L. Blood
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![Office and residence of C. L. Blood at 27 Bond Street, New York City](/Images/godic/202501/31/New_York_office_and_residence_of_C._L._Blood4341.png")
![Visiting card of C. L. Blood](/Images/godic/202501/31/Visiting_card_of_C._L._Blood4341.jpg")
Charles L. Blood (born ca. 1834; alias C. H. Lewis et al.) was an American con artist and self-styled physician who operated in Boston, New York City, Philadelphia, and Chicago. He produced a patent medicine treatment known as "oxygenized air", which he promoted as a cure for catarrh, scrofula, consumption, and diseases of the respiratory tract.