101. Fred L. Soper at an old fort in Bahia, Brazil

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102. The Use of Mice in Tests of Immunity against Yellow Fever

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103. Vaccination against Yellow Fever with Immune Serum and Virus Fixed for Mice

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104. Letter from Wilbur A. Sawyer to Margaret Sawyer

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105. Letter from Wilbur A. Sawyer to Margaret Sawyer

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106. Letter from Wilbur A. Sawyer to Margaret Sawyer

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107. Letter from Wilbur A. Sawyer to Margaret Sawyer

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108. Pasteur Institute at Brazzaville, Belgian Congo

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109. Rest house at Brazzaville, Belgian Congo

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110. Letter from Wilbur A. Sawyer to Margaret Sawyer

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111. Houses of Dr. Mahaffey and Dr. Beeuwkes, Lagos, Nigeria

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112. Wilbur A. Sawyer's cottage while visiting the Yellow Fever Laboratory in 1926-1927 in Lagos, Nigeria

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113. Laboratory building of the Yellow Fever Laboratory, Lagos, Nigeria

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114. Animal houses of the Yellow Fever Laboratory, Lagos, Nigeria

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115. Boats transporting cocoa off the shore of Accra, Gold Coast

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116. Market in the native town, Accra, Gold Coast

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117. Houses in the native town, Accra, Gold Coast

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118. View of Cornell Medical School and New York Hospital from Wilbur A. Sawyer's laboratory at the Rockefeller Institute

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119. Rockefeller Institute for Medical Research

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120. Yellow fever headquarters at Cuiaba, Mato Grosso, Brazil

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