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

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42. Letter from Wilbur A. Sawyer to Margaret Sawyer

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43. Excerpt from Wilbur A. Sawyer's diary concerning his own yellow fever

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44. The Relationship of Yellow Fever of the Western Hemisphere to that of Africa and to Leptospiral Jaundice

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45. The Preservation of Yellow Fever Virus

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46. Letter from Wilbur A. Sawyer to Margaret Sawyer

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47. Letter from Wilbur A. Sawyer to Margaret Sawyer

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48. Letter from Wilbur A. Sawyer to Margaret Sawyer

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49. Letter from Wilbur A. Sawyer to Margaret Sawyer

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50. Letter from Wilbur A. Sawyer to Margaret Sawyer

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