PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

Ptolemy, Almagesti (tr. Stephanus Gracilis)

Paris, Gulielmus Cavellat, 1556 · 22v

Facsimile

mus ad hunc etiam modum. Alia ratio inveniendarum ascensionum propositarum i. m. P Sit enim primum meridianus circulus ABGD, et horizontis quidem semicirculus BED, aequatoris autem AEG, eius vero qui per medium signorum est FEI, in verno puncto posita e sectione, Lemmation i. m. P et desecta in eo quavis ET peripheria, describatur per punctum T segmentum circuli paribus intervallis ab aequatore distantis, nempe TC, sumptoque L aequinoctialis polo, per eum describantur maximorum circulorum qua-