Page:Organum mathematicum libris IX. explicatum (1668).djvu/225

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LIBER SECUNDUS GEOMETRICUS,


In quo explicatur


LOCULAMENTUM SECUNDUM


ORGANI MATHEMATICI,


signatum littera B, et continens Tabellas


pro


GEOMETRIA PRACTICA; Traditurque uberior pro eadem


INSTRUCTIO.


PROOEMIUM.


LOculamentum secundum Organi Mathematici, signtim littera B, continet Tabellas pro Geometria practica, quaerum usus et praxis elucet praecipue in dimensione altitudinem per earum umbras, tam rectas, quam versas; idque et cum, et sine Arithmetico calculo, qui molestam subinde create Tyronibus, preasertim inexercitatis. Ut tamen ad hanc quoque adfuescant Principes et Nobiles, addidit