A good, all round copy of John Harris’ “Plain and Spherical Trigonometry” c. 1706 ( 1st Edition) with original owner’s signature (J.Weekes) and a date of 1708. Additional chapters on Spherick Geometry and Projections of the Sphere in Plano. Although the leather spine has been taped and there are some knocks to the corners, the interior of the book is very good to excellent with NO loose pages (177 total) and 8 fold out plates. For use with surveying, navigation and general appreciation of ALL of the calculations concerning spheres, it is of octodecimo format (6 1/4 x 4 ” or 16 x 10.5 cm.). Frontispiece page missing but otherwise a complete copy. Many tables in the rear with handwritten corrections and annotations. In English.
Other complete copies are selling for as much as 880 Euros (Abraxas-libris). France.
Ask the Dealer
Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 30 years. A former Science teacher, he has an innate love for anything natural or mechanical. Specializing in optical (microscopes, telescopes), surveying, medical, weighing and drawing instruments, he is an active participant of the Scientific Instrument Fair in London. Living in Stratford, Ontario, Canada, with his wife and two children; Mark looks forward to meeting as many fellow collectors as possible, and has a worldwide following on eBay (Sciopti).
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