Note 29 — ERRATUM. p. 78, note 1, l. 19; for “were in orders, for the most part in holy orders;” read “were generally speaking in holy orders;”

Herein Harvey’s sagacity brought him towards the truth. “Air,” he says in the De generatione, “is given neither for the cooling nor the nutrition of animals ... it is as if heat were rather enkindled within the fœtus (at birth) than repressed by the influence of the air.” Boyle (who says that he worked under the influence of Harvey’s discoveries) carried this matter forward by most interesting and sagacious experiments with his air-pump. For the layman, I may add that (to speak generally) before Harvey’s time respiration was regarded not as a means of combustion but of refrigeration. How man became such a fiery dragon was the puzzle!