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Deinde in quibus locis secant lineae paralleloe lineam eam quae dicitur horizon, in dexteriore parte erit littera S, in sinisteriore T. et ab littera S ducatur linea parallelos axoni ad extremum dextrum hemicyclium, ubi erit littera V; et ab T ad sinistrum hemicyclium item parallelos linea ducatur ad litteram X. haec autem paralleloe lineae vocitantur †locothomus. et tum circini centrum conlocandum est eo loci, quo secat circinationem aequinoctialis radius, ubi erit littera F; et diducendum ad eum locum, quo secat circinationem aestivus radius, ubi est littera H. e centro aequinoctiali intervallo aestivo circinatio circuli menstrui agatur, qui menaeus dicitur. ita habebitur analemmatos deformatio.
Vitruvius Pollio. On Architecture. F. Krohn. Lipsiae. B.G. Teubner. 1912.
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