Philosophical transactions of the Royal Society of London (1695)
Royal Society (Great Britain) · London : Royal Society of London · leaf 764
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Internet Archive · Natural History Museum Library, London · Public domain (published before 1931). Free to use for anything.
![An illustration from Sphaera mundi, seu, Cosmographia : demonstratiua, ac facili methodo tradita : in qua totius mundi fabrica, vna ̀cum novis, Tychonis, Kepleri, Galilaei, aliorumq[ue] astronomorum adinuentis continetur : accessere, I. Breuis introductio ad geographiam, II. Apparatus ad mathematicarum studium, III. Echometria, idest geometrica traditio de echo (1620)](https://img.insideoutlibrary.com/img/200/ia-sphaeramundiseuc00bian_0-68-0.webp)
