Note 6 — Chapter I

The British Museum contains four manuscript copies of Hero’s “Pneumatics,” which were written in the fifteenth and sixteenth centuries. These manuscripts have been examined with great care, and a translation from them prepared by Prof. J. G. Greenwood, and published at the desire of Mr. Bennett Woodcroft, the author of a valuable little treatise on “Steam Navigation.” This is, so far as the author is aware, the only existing English translation of any portion of Hero’s works.