Instrumentum instrumentorum: horologiorum sciotericorum. Erstlich werden gelehrt auffreissen die vier hauptsonnen Uhren ohne einige verenderung dess Circkels . Durch B. L.

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4to, pp. 18, [2], with title printed in red and black and with engraved vignette showing a sundial, and seven engraved illustrations in the text, two full-page; old marbled paper back-strip. SECOND EDITION OF THE SWISS PASTOR S AND PASSIONATE MATHEMATICIAN AND ASTRONOMER S FINAL WORK ON SUNDIALS. Following early studies at the Fraumünster Collegium, Zurich, Leemann completed his education at Bern and Marburg. In 1554 he left with a master s degree in the liberal arts, then taught at Schaffhausen for three years. In 1557 he became parson at Dietikon; in 1560 professor of Hebrew at the Collegium Carolino at Zurich and deacon of the Grossmünster. He was elected to the highest rectorate there in 1592. Besides teaching catechism he dedicated himself to the study and practice of mathematics and astronomy. His intervention regarding deficiencies of the new Gregorian calendar resulted in an agreement between reformed and catholic cantons on its introduction. Leemann published his first work on sundials in 1589. The present work first appeared in 1604. This is a very scarce work with few copies recorded outside of Europe. Seller Inventory # 97bab7c39f0f06f56d59316b4be286e1

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