The Divided Circle : A History of Instruments for Astronomy, Navigation and Surv
Zustand: geringe Gebrauchs- u. Lagerspuren, sehr gutes Exemplar. A Phaidon Christie's collectors monograph. Literaturverz. S. 215 - 217 - with 260 illustrations, including 16 in colour - Astronomers, navigators and surveyors have always had one need in common-to be able to measure accurately angles between distant objects. The instruments they have used to do this, although adapted to different purposes, have all worked by means of a sight moving over a divided circle - a circle or arc carrying a scale of degrees. It is such mathematical instruments, forming a coherent group both scientifically and historically, that are the subject of this book. These instruments were among the finest of their times, setting the highest standards of precision and accuracy.
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