New Theater of Machines

because the larger the circumference or perimeter of the same, the easier it is to tread, which is always to be well observed not only in this one but also in the following ones.

The XVI. Figure.

A Tread Mill.

This is a simple mill, which also has a tread-wheel A, which can be easily trodden by one person. Attached to the axle tree of the tread-wheel is the spur wheel B, which engages into the sticks C, and thus causes the rotation of the wheel D, which engages into the lantern pinion at C, along with the rotation of the millstone at F; in this mill, the movement of the bolter can be easily arranged through the upright rod G.

The XVII. Figure.

A Tread Mill.

The present mill is arranged (where one lacks water) in a convenient place with a large tread-wheel C, which is fastened to the axle tree A and can be driven around with the feet, and it can be easily governed by two persons. The axle tree A, which has an iron pivot and stands on F, has at the bottom at D a spindle-wheel, which grips the tooth of the wheel G with the same, and then further moves around the same with its axle tree O, on which axle tree a cogwheel H is then further arranged, which in turn grips two lantern pinions I on both sides and causes the pivot-wheels K K, their lantern pinions, and the millstone L L to rotate.

Note: If one has space, one could arrange even more transmissions and millstones with this mechanism, and also attach flywheels for the help and ease of turning, according to what the experienced master might like or please, wherefore such are intentionally left out and passed over here; furthermore, one must also keep in mind that the larger or wider the circumference or the rotation of the tread-wheel C is taken, as thought above, the easier

it is to tread, as the mechanism and experience themselves will teach.

The XVIII. Figure.

A Tread Mill.

This is a type of mill which is trodden by a horse A, and thus by pushing forward the wheel B, the cogwheel C, which engages into the lying wheel D, causes the millstone F to rotate through the lantern pinion E, where it must be kept in mind that one should place the horse such that its hind legs come to stand further out beyond the axle tree (meaning perpendicular or plumb line), and thus it might be more convenient for driving the wheel forward.

The XIX. Figure.

A Horse Mill.

The present diagram of this mill shows a type where one cannot have water, yet one can easily arrange and usefully employ the mill through the drive of a horse. The large horizontally lying wheel H is driven by the rod B, to which the horse D is harnessed; this wheel then engages with its tooth into the lantern pinion C, and thus the millstone A is made to rotate through the same. The lever E, however, shows how one can adjust the millstone high or low, which can easily happen when one pushes the iron pivot into the holes at G higher or lower (depending on necessity) and maintains the millstone at such height through the help of the counterweight F attached to the lever E, which will then be very useful in this and other types of mills, and thus further reminders are deemed unnecessary.

The XX. Figure.

A Horse Mill.

This type of mill is governed in the same way as the previous one by a horse or other animal, when, namely, the large horizontally lying cogwheel S with its tooth engages into the spindles of the lantern pinion.