Essay Review: Kepler,Hypothesis and Scientific Methodology: The Birth of History and Philosophy of Science: Kepler's “A Defence of Tycho against Ursus” with Essays on its Provenance and Significance

Kepler J. , Catalogus librorum a M.D. Tychone Brahe vel editorum vel destinatorum, Kepler-MSS Pulkowo, v (now Leningrad F. 285, op. 1, no. 5), 315 and 315^V. To be published in Kepler Gesammelte Werke, xx, 1 (in preparation).

Concerning this matter Kepler remarks with reference to Tycho's plans: “De hypothesibus seorsim scribere voluit et adjungere assertionem famae contra Ursum” (Kepler-MSS, v, 315^v).

Kepler-MSS Pulkowo, xxii (Leningrad F. 285, op. 1, no. 18), 510^v−525. Edition in KGW, xx, 1 (in preparation).

Gerardi Joannis Vossii Ars historica sive de Historiae et Historices natura historiaeque scribendae praeceptis commentario (Amsterdam, 1699), 5.

Bacon Francis , The works (ed. by Spedding J. Ellis R. L. and Heath D. D. ), iv (London, 1860), 300.

“Conformitas cum rerum natura” (Kepler-MSS, v, 296^v).

“Primum enim in hypothesibus rerum naturam depingimus” (Kepler-MSS, v, 271).

This results in a negative meaning, when Kepler remarks on Ursus: “Hypothesin negat esse, quod verum et mundo conforme” (Kepler-MSS, xxii (no. 18), 52^v).

Kepler-MSS, v, 276^v.

About the advancement of these works Kepler already reports in a letter to Magini J. A. from 1 June 1601 (Letter no. 190, in KGW, xiv).

Astronomia nova, I, 4 (KGW, iii, 74) and1 I, 6 (KGW, iii, 103).