[8] For illustration, see Journal of Outdoor Life, January 1914.
[9] For illustration, see Carrington, "Fresh Air and How to Use It," Chap. IV, page 55.
[10] For a diagrammatic presentation of Wolff-Eisner's theory, see "Tuberculin Treatment" by Riviere and Moreland, page 6.
[11] Not absolutely necessary: may get along with graduated cylinder and syringe.
[12] See previous footnote.
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