Including all Robert Boyle's published works, this is the final seven volumes of a 14-volume set. All texts are fully annotated and comprehensively indexed. Works originally in Latin are presented in their contemporary English translations.

Part II Volume 8 Excellency of Theology, 1674; Hidden Qualities of the Air, 1674; Reason and Religion, 1675; Mechanical Origin of Qualities, 1675; Phil. Trans. items, 1674-6 Volume 9 Degradation of Gold, 1678; Producibleness of Chymical Principles, 1680; Spring of the Air, 2nd Continuation Eng. trans., 1682; Aerial Noctiluca, 1680; Icy Noctiluca, 1682; Things above Reason, 1681; Salt-water Sweetened, 1683; Items contributed to Hooke's Philosophical Collections and various Phil. Trans. articles Volume 10 Natural History of Human Blood, 1684; Experiments about Porosity, 1684; High Veneration to God, 1684-5; Experimental History of Mineral Waters, 1685; Languid and Unheeded Motion, 1685; Specific Medicines, 1685; Vulgarly Receiv'd Notion of Nature, 1686 Volume 11 Martyrdom of Theodora, 1687; Final Causes, 1688; Advertisement, 1688; Some Receipts of Medicines, 1688; Catalogue of Writings, 1688; Medicina Hydrostatica, 1690; Christian Virtuoso, 1690-1; Experimenta et Observationes Physicae, 1691 Volume 12 Posthumous Phil. Trans. papers; General History of the Air, 1692; Medicinal Experiments, 1692-4; Discourse against Customary Swearing, 1695, Christian Virtuoso I, Appendix, and II, 1744; Papers in Birch's Life of Boyle, 1744 Volumes 13-14 Hitherto unpublished writings by Boyle, representing the most substantial publication of new material by him since his lifetime. These include such early writings as the original version of Boyle's Martyrdom of Theodora; writings from Boyle's early scientific phase in the early1650s; discarded sections of published works, including Usefulness of Natural Philosophy and Vulgarly Receiv'd Notion of Nature; and fragments of works never published.Also included is a complete text of Boyle's inventories of his unpublished writings, a key source for his intellectual evolution, and an index to the edition as a whole.