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⁸ This point has been detailed in my recent study, Mendelsohn, E., Heat and Life: The Development of the Theory of Animal Heat, Cambridge, Mass.: Harvard Univ. Press, 1964.CrossRefGoogle Scholar

⁹ The necessity for a fuller study of this influence is evident. See Mendelsohn, E., ‘The Biological Sciences in the Nineteenth Century: Some Problems and Sources’, History of Science, iii (1964), 39–59.CrossRefGoogle Scholar

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³⁵ A copy of this manuscript generously was made available to me by Dr. P. Bohringer, director of L. Schwann Verlag, Düsseldorf, who has a sizeable collection of materials relating to Theodore Schwann.

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⁴⁸ Ibid., 80.

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