GEOMETRICAL
DEMONSTRATIONS
OF THE
MEASURE
OF
Running Waters.

BY
D. BENEDETTO CASTELLI,
Abbot of CASSINA, and Mathematician to
P. VRBAN. VIII.

DEDICATED
To the most Illustrious, and most Excellent Prince

DON THADDEO BARBERINI,
PRINCE OF
PALESTRINA,
AND
GENERAL of the HOLY CHURCH.

LONDON,
Printed Anno Domini, MDCLXI.