Art. 5. Of Water-mills for grinding Corn, [152.]
The Water-mills of the Ancients were like ours.
Art. 6. Of other Hydraulick Machines, [153.]
Three sorts of Water-Machines; first, for shewing the hour, [153.] Second, Organs, [154.] Third, for measuring the Way by Water, [154.] by Land, [155.]
Art. 7. Of Machines of War, [155.]
Three kinds; I. To dart Arrows, &c. [155.] II. To batter down Walls, [157.] III. To cover them in their Approaches to the Walls of the Besieged, [158.]
