![KEPLER, Johannes (1571-1630). Ad epistolam clarissimi viri D. Jacobi Bartschii ... responsio. [Görlitz:] Typis Saganensibus, 1629 [but 9 November 1628].](https://www.christies.com/img/LotImages/2017/NYR/2017_NYR_14998_0190_000(kepler_johannes_ad_epistolam_clarissimi_viri_d_jacobi_bartschii_respon101118).jpg?w=1)
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KEPLER, Johannes (1571-1630). Ad epistolam clarissimi viri D. Jacobi Bartschii ... responsio. [Görlitz:] Typis Saganensibus, 1629 [but 9 November 1628].
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KEPLER, Johannes (1571-1630). Ad epistolam clarissimi viri D. Jacobi Bartschii ... responsio. [Görlitz:] Typis Saganensibus, 1629 [but 9 November 1628].
The first edition of Kepler's letter to Jacob Bartsch on the calculating of ephemerides. The young Strasbourg scientist Jacob Bartsch used Kepler's Tabulae Rudolphinae for calculating ephemerides, or astronomical tables, and wrote to him offering his cooperation. The letter never reached Kepler, who had moved frequently between September 1627 and August 1628. So Bartsch directly addressed Kepler in his ephemerides published for 1629, and the present publication is Kepler's response. In addition to accepting Bartsch's proposal for collaboration, he also gives accounts of his travels during the previous months and outlines possible future plans. Caspar notes that this copy was actually printed in Görlitz in 1628, based on the date at the end of the text. Rare: according to American Book Prices Current, no other copy has sold at auction since the Honeyman copy, sold Sotheby Parke Bernet, 12 May 1980, lot 1804. Caspar 80; Houzeau and Lancaster 15102.
Quarto (185 x 140mm). Modern vellum; blue quarter morocco folding box. Provenance: R. L. U. (bookplate).
The first edition of Kepler's letter to Jacob Bartsch on the calculating of ephemerides. The young Strasbourg scientist Jacob Bartsch used Kepler's Tabulae Rudolphinae for calculating ephemerides, or astronomical tables, and wrote to him offering his cooperation. The letter never reached Kepler, who had moved frequently between September 1627 and August 1628. So Bartsch directly addressed Kepler in his ephemerides published for 1629, and the present publication is Kepler's response. In addition to accepting Bartsch's proposal for collaboration, he also gives accounts of his travels during the previous months and outlines possible future plans. Caspar notes that this copy was actually printed in Görlitz in 1628, based on the date at the end of the text. Rare: according to American Book Prices Current, no other copy has sold at auction since the Honeyman copy, sold Sotheby Parke Bernet, 12 May 1980, lot 1804. Caspar 80; Houzeau and Lancaster 15102.
Quarto (185 x 140mm). Modern vellum; blue quarter morocco folding box. Provenance: R. L. U. (bookplate).