[6] _Ibid._, p. 222. [7] _Ibid._, p. 215. [8] _Ibid._, p. 219. [9] _Ibid._, p. 213. [10] _Ibid._, pp. 217-219. [11] _Ibid._, p. 231. [12] Alexander Ross, _The Philosphicall Touch-Stone; or Observations upon Sir Kenelm Digbie's Discourses of the nature of Bodies, and of the reasonable Soule_, London, 1645. [13] Alexander Ross, _Arcana Microcosmi: or, The hid secrets of Man's Body disclosed ... In an anatomical duel between Aristotle and Galen concerning the parts thereof_, London, 1652, p. 87. [14] Nathaniel Highmore, _The History of Generation, Examining the several Opinions of divers Authors, expecially that of Sir Kenelm Digby, in his Discourse of Bodies_, London, 1651, p. 4. [15] _Ibid._, pp. 26-27. [16] _Ibid._, pp. 27-28. [17] _Ibid._, p. 45. [18] _Ibid._, Pp. 90-91. [19] William Harvey, _Opera omnia: a Collegio Medicorum Londinensi edita_, Londini, 1766, p. 136. [20] William Harvey, _Anatomical Excercises on the Generation of Animals_, trans. Robert Willis, London, 1847, p. 462. [21] _Ibid._, pp. 336-339. [22] _Works of William Harvey_, trans. Robert Willis, London, 1847, pp. lxx-lxxi. [23] Harvey, _op. cit._, pp. 462-463. [24] _Ibid._, p. 457. [25] F. J. Cole, _Early Theories of Sexual Generation_, Oxford, 1930, p. 140. [26] Thomas Browne, _The Works_, ed. Geoffrey Keynes, Chicago, 1964, I, 261-262. [27] _Ibid._, II, 265. [28] _Ibid._, III, 442. [29] _Ibid._, III, 442-452. [30] _Ibid._, I, 50. [31] _Ibid._, I, 14. [32] Walter Needham, _Disquisitio anatomica de formato foetu_, London, 1667. [33] John Mayow, "De Respiratione foetus in utero et ovo," in _Tractatus Quinque Medico-Physici_, Oxonii, 1674, p. 311. [34] _Ibid._, pp. 319-320. [35] Robert Boyle, _The Works_, London, 1772, I, 548-549. [36] Browne, _op. cit._, II, 261. II _Robert Boyle as an Amateur Physician_ LESTER S. KING Robert Boyle was not a physician. To be sure, he had engaged in some casual anatomical studies,[37] but he had not formally studied medicine and did not have a medical degree. Nevertheless, he engaged in what we would call medical practice as well as medical research and exerted a strong influence on the course of medicine during the latter seventeenth century, an influence prolonged well into the eighteenth. He lived during the period of exciting yet painful transition when medical theory and practice were undergoing a complete transformation towards what we may call the "early modern" form. The transition, naturally gradual, extended over three centuries, but I wish to examine only a very small fragment of this period, namely, the third quarter of the seventeenth century.