Held at Philadelphia for promoting useful knowledge.

This is a print on demand publication. An annotated translation based on a collation of the Selestat and Phillipps-Corning (PC) manuscripts, with a reproduction of the two manuscripts. Contents: (1) The manuscripts and their background: The Selestat manuscript; The PC manuscript; Sir Thomas Phillips's pub. in "Archaeologia," 1847; Note on chap. enumeration; Table of concordance between manuscripts; A note on the translation; The "Mappae Clavicula" as a source for the history of technology; and The background and place of the "Mappae Clavicula" in the history of art; (2) The translation; (3) Appendices: Photorepro. of the Selestat manuscript; Photorepro. of the PC manuscript; and A note on the runes; and (4) Bibliography. This is not an original: it is copied on-demand.

By explaining how to sire multicolored horses, produce nuts without shells, and create an egg the size of a human head, Giambattista Della Porta's Natural Magic (1559) conveys a fascination with tricks and illusions that makes it a work difficult for historians of science to take seriously. Yet, according to William Eamon, it is in the "how-to" books written by medieval alchemists, magicians, and artisans that modern science has its roots. These compilations of recipes on everything from parlor tricks through medical remedies to wool-dyeing fascinated medieval intellectuals because they promised access to esoteric "secrets of nature." In closely examining this rich but little-known source of literature, Eamon reveals that printing technology and popular culture had as great, if not stronger, an impact on early modern science as did the traditional academic disciplines.

A history of the book and intellectual property that includes military technology and military secrets. Winner of The Morris D. Forkosch Prize from the Journal of the History of Ideas In today's world of intellectual property disputes, industrial espionage, and book signings by famous authors, one easily loses sight of the historical nature of the attribution and ownership of texts. In Openness, Secrecy, Authorship: Technical Arts and the Culture of Knowledge from Antiquity to the Renaissance, Pamela Long combines intellectual history with the history of science and technology to explore the culture of authorship. Using classical Greek as well as medieval and Renaissance European examples, Long traces the definitions, limitations, and traditions of intellectual and scientific creation and attribution. She examines these attitudes as they pertain to the technical and the practical. Although Long's study follows a chronological development, this is not merely a general work. Long is able to examine events and sources within their historical context and locale. By looking at Aristotelian ideas of Praxis, Techne, and Episteme. She explains the tension between craft and ideas, authors and producers. She discusses, with solid research and clear prose, the rise, wane, and resurgence of priority in the crediting and lionizing of authors. Long illuminates the creation and re-creation of ideas like "trade secrets," "plagiarism," "mechanical arts," and "scribal culture." Her historical study complicates prevailing assumptions while inviting a closer look at issues that define so much of our society and thought to this day. She argues that "a useful working definition of authorship permits a gradation of meaning between the poles of authority and originality," and guides us through the term's nuances with clarity rarely matched in a historical study.