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URANOMETRIC

original: "VRANOMETRICVM". This term comes from the Greek words for "heaven" and "measure." It refers to the measurement of the stars and celestial bodies.

In which

THE FOUNDATIONS OF LOGARITHMIC TRIGONOMETRY,

and its rules are demonstrated, and astronomical calculations

are reduced almost entirely to common addition.

Before logarithms, astronomers had to perform long, difficult multiplications. Logarithms allowed them to solve these problems by simply adding numbers together.

A work most useful to astronomers, geometers, arithmeticians, experts in perspective, architects (especially military ones), mechanics, geographers, and even to natural philosophers themselves.

BY THE AUTHOR BROTHER BONAVENTURA CAVALIERI OF MILAN

of the Order of the Jesuates of Saint Jerome, Titular Prior,

The Jesuates were a lay religious order focused on caring for the sick and producing apostolic work. They were separate from the Jesuits and were later dissolved in 1668.

AND IN THE NOURISHING UNIVERSITY OF BOLOGNA

original: "ALMO BONONIENSI GYMNASIO". The word "almo" means soul-nourishing or cherishing, often used to describe a university as an "alma mater."

Primary Professor of Mathematics.

TO THE MOST ILLUSTRIOUS AND WISE

FIFTY MEN OF THE BOLOGNESE SENATE.

BOLOGNA. From the press of Nicolò Tebaldini. 1632.

With the Permission of the Superiors.

This phrase indicates that the work was reviewed and approved by both church and secular censors before printing.

1632

General Uranometric Directory (Directorium Generale Uranometricum)