Project icon: lavishly furnished initial letter with a painting of Ptolemy using an astrolab.


Arabus et Latinus

Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ ς τ υ φ χ ψ ω
The following characters have a special meaning.
Put them next to a word without a space between.
" "encloses a sequence of words so that the sequence is searched as a whole.
+The following word must appear.
-The following word must not appear.
~The following word should not appear but may appear.
<The following word should appear but is not as relevant as other words.
>The following word should appear and is more relevant than other words.
( )groups words together so that one of the prefixes above can be applied to the whole group.
*is a wildcard behind a word, representing null, one or several arbitrary characters.

Work C.1.15

Tractatus super propositiones Ptolomei de sinubus et chordis

Text ‘(Vienna, ÖNB, 5203) ‘Tractatus sinuum et chordarum Georgii Peurbachii. Sinuum, cordarum et arcuum noticia ad celestium motuum cognitionem pervalde necessaria existit, ideo de eorum doctrina restat in presenti perquirendum — Et similiter sciemus quantitates reliquarum chordarum, facilis ergo est secundum premissorum tenorem cordarum ad suos arcus cognitio. Finis.’

Content Explanation of six propositions on sines and chords.

Origin Written by Peurbach, who took over parts of John of Gmunden’s De sinubus, chordis at arcubus.

Bibl. H. H. L. Busard, Der Traktat de sinubus, chordis et arcubus von Johannes von Gmunden, Wien, 1971, 75; H. Grössing, Humanistische Naturwissenschaft. Zur Geschichte der Wiener matematischen Schulen des 15. und 16. Jahrhunderts, Baden-Baden, 1983, 106 and 115-116; R. Lorch, ‘Some Remarks on the Almagestum parvum’, in Amphora. Festschrift für Hans Wussing zu seinem 65. Geburtstag, eds S. S. Demidov, M. Folkerts et al., Basel-Boston-Berlin, 1992, 407-438: 422.

Ed. ---


Nürnberg, Johannes Petreius, 1541, sig. A2r-B1v

Basel, Henricus Petrus, 1561, sig. 131-139


Vienna, ÖNB, 5203, s. XV, f. 124r-128rImages