Wjkström [ Wijkstrom ], Andreas [ Anders ] & Klingenstierna, Samuele [ Samuel ] — Methodus Geometrica Determinandi Orbitas Planetarum [ Planetarium ]

Upsaliae [ Uppsala ] 1749 1st edition. Disbound, VG. [vi]+28pp, quarto, woodcut headpieces & astronomical illustrations, a nice near fine copy, title just a little soiled. Uncommon mathematical paper on the geometric calculation of the orbits of planets. The paper was written by Wijkström under the guidance of Klingenstierna, with the opening paragraphs referencing Newton, Kepler & Brae. Samuel Klingenstierna [ 1698 - 1765 ] Swedish mathematician & astronomer who was made Professor at Uppsala in 1728. Apart from his contributions to the field of refraction ( noting errors in Newton's theories on the matter ) he was also involved in the invention of the achromatic telescope. Anders Wijkström [ 1726 - 1763 ] mathematician & astronomer who wrote a second similar paper in 1752. HL11951.