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A description of the method used to hit targets in the obscurity of night using previous calculations of the distance to the target and the range of the cannon, and by applying the artillerist’s quadrant. Calculations of this kind were accomplished after a theory of ballistics had emerged that could be applied to a shot in which the first part of the trajectory was perceived as a straight line. From the German translation of Ramelli Agostino, Le diverse et artificiose machine, Parigi, In casa dell’autore, 1588, published in 1620, p. 315.