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Start Over Subjects Physiological Phenomena ✖Remove constraint Subjects: Physiological Phenomena Subjects Hygiene ✖Remove constraint Subjects: Hygiene Authors Blaisdell, Albert F. (Albert Franklin), 1847-1927, author ✖Remove constraint Authors: Blaisdell, Albert F. (Albert Franklin), 1847-1927, author Dates by Range 1850-1899 ✖Remove constraint Dates by Range: 1850-1899 Publication Year 1800 to 1899 ✖Remove constraint Publication Year: <span class="from" data-blrl-begin="1800">1800</span> to <span class="to" data-blrl-end="1899">1899</span>