1. Metchnikoff, E. Lectures on the Comparative Pathology of Inflammation p. xvii (Dover, New York, 1968); reprint of the 1893 English translation.
2. Mayr, E. in The Darwinian Heritage (ed. Kohn, D.) 755–772 (Princeton University Press, Princeton, 1985).
3. See, for example, Hull, D.L. in The Darwinian Heritage (ed. Kohn, D.) 773–812 (Princeton University Press, Princeton, 1985).
4. For a discussion of Darwin and the physiologists, see French, R.D. J. Hist. Biol. 3, 253–274 (1970).
5. Geison, G. Michael Foster and the Cambridge School of Physiologists pp. 340–344 (Princeton University Press, Princeton, 1978).