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Ptolemaeus Arabus et Latinus

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Work C.2.6

Petrus Gaszowiec
Tabula de naturis particularibus signorum et facierum


‘(Munich, BSB, Clm 51) ‘Nature particulares signorum et facierum quas ponit Ptolomeus secundo Quadripartiti, capitulo undecimo, verificate per venerabilem egregium virum patrum (!) Gaschowiez medicine doctorem. Totum signum Arietis facit tonitrua et lampagos (Pisces) meridionales facientes grandinem <de natura> Saturni.’


A table summarising Quadripartitum II.11 on the influence of the signs and each of their decans on the weather.


Drawn up by Petrus Gaszowiec at the University of Cracow in 1463.


This table was taken over by Johannes de Glogau in his Tractatus preclarissimus in iudiciis astrorum de mutationibus aeris (=Summa astrologie, Book II), in the late 15th c., where it forms Differentia 37, see MSS Jena, TULB, El. phil. q. 3, s. XVI, f. 116v (this copy has the title only); Karlsruhe, BLB, Rastatt 36, s. XV, f. 132r; London, BL, Sloane 3130, s. XVI, f. 41v-42v; Paris, BnF, lat. 7443C, s. XV, f. 93v-94r; and ed. Cracow, Florianus et Wolfgangus, 1514, sig. 24r-25r. I have not checked MS Vienna, ÖNB, 5000, s. XVI, f. 1r-57v. Interestingly, three of these witnesses date the work to 1463 (no date is given in the other MSS) in the title: ‘Differentia trigesima septima. Naturas particulares signorum et facierum comprehendens quas ponit Ptholomeus secundi Quadripartiti, capitulo XI, rectificate anno domini 1463 per venerabilem virum magistrum Petrum de Gaschowycz medicine doctorem, astrologice scientie virum doctissimum cuius anima requiescat in pace’ (ed. Cracow 1514, sig. 24r; same in the Jena and London MSS). The date 1463 is perfectly plausible as Petrus Gaszowiec became doctor of medicine in 1454 and died in 1474.


M. Markowski, Astronomica et astrologica Cracoviensia ante annum 1550, Firenze, 1990, 182-183. On Petrus Gaszowiec, see also A. Birkenmajer, ‘Les astronomes et les astrologues silésiens au Moyen Age’, in A. Birkenmajer, études d’histoire des sciences en Pologne, Wrocław, 1972, 437-468: 457-459 [originally published in Polish in 1937]; A. Birkenmajer, ‘Piotr Gaszowiec’, in A. Birkenmajer, études d’histoire des sciences en Pologne, Wrocław, 1972, 527-529 [originally published in Polish in 1949]; R. L. Kremer, ‘“Abbreviating” the Alfonsine Tables in Cracow: The Tabulae aureae of Petrus Gaszowiec (1448)’, Journal for the History of Astronomy 38 (2007), 283-304; P. W. Knoll, “A Pearl of Powerful Learning”. The University of Cracow in the Fifteenth Century, Leiden-Boston, 2016, 386-387 and 572-573; Clavis scriptorium et operum Medii Aevi Poloniae, eds J. Kaliszuk, A. Pieniądz, P. Węcowski, K. Skwierczyński, Kraków, 2019, 724-729 (no. 626). The latter work ignores the present text.