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