A—AXLE. B—WATER-WHEEL. C—DRUM COMPOSED OF RUNDLES.
D—OTHER AXLE.
E—TOOTHED WHEEL. F—ITS SPOKES. G—ITS SEGMENTS. H—ITS TEETH. I—CAMS
OF THE AXLE.
segment, measured over its round back, is four feet and three palms long.
There are four spokes, each two palms wide and a palm and a digit thick; their
length, excluding the tenons, being two feet and three digits. One end of the
spoke is mortised into the axle, where it is firmly fastened with pegs; the
wide part of the other end, in the shape of a triangle, is mortised into the
outer segment opposite it, keeping the shape of the same as far as the segment
ascends. They also are joined together with wooden pegs glued in, and these
pegs are driven into the spokes under the inner disc. The parts of the spokes
in the shape of the triangle are on the inside; the outer part is simple. This
triangle has two sides equal, the erect ones as is evident, which are a palm
long; the lower side is not of the same length, but is five digits long, and a
mortise of the same shape is cut out of the segments. The wheel has sixty
teeth, since it is necessary that the rundle drum should revolve twice while
the toothed wheel revolves once. The teeth are a foot long, and project one
palm from the inner disc of the wheel, and three digits from the outer disc;
E—TOOTHED WHEEL. F—ITS SPOKES. G—ITS SEGMENTS. H—ITS TEETH. I—CAMS
OF THE AXLE.
segment, measured over its round back, is four feet and three palms long.
There are four spokes, each two palms wide and a palm and a digit thick; their
length, excluding the tenons, being two feet and three digits. One end of the
spoke is mortised into the axle, where it is firmly fastened with pegs; the
wide part of the other end, in the shape of a triangle, is mortised into the
outer segment opposite it, keeping the shape of the same as far as the segment
ascends. They also are joined together with wooden pegs glued in, and these
pegs are driven into the spokes under the inner disc. The parts of the spokes
in the shape of the triangle are on the inside; the outer part is simple. This
triangle has two sides equal, the erect ones as is evident, which are a palm
long; the lower side is not of the same length, but is five digits long, and a
mortise of the same shape is cut out of the segments. The wheel has sixty
teeth, since it is necessary that the rundle drum should revolve twice while
the toothed wheel revolves once. The teeth are a foot long, and project one
palm from the inner disc of the wheel, and three digits from the outer disc;
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