New experiments upon vipers : with exquisite remedies, that may be drawn from them, as well for the cure of their bitings, as for that of other maladies : also a letter of Francisco Redi, concerning some objections made upon his observations about vipers, written to Monsieur Bourdelot and Mr. Alex. Morus : together with the sequel of New experiments upon vipers, in a reply to a letter written by Sign. F. Redi