Graduated Arm and Pulley Weight Tracing Concentric Arcs
A pivoting beam swings over a fan of arcs as a weight hangs from a pulley at the right
A mechanical diagram in which a graduated beam, hinged at a point on a horizontal baseline, swings upward while faint concentric arcs trace the paths of its marked divisions. At the right end of the baseline a small pulley carries a hanging weight, labelled 8/10 g, and the top of the arm is labelled 5/10 n, so the sheet studies how a swinging weighted arm relates to a counterweight running over a pulley. A single line of mirror-script writing runs along the top edge that the bundle does not transcribe; only the figure's letter-and-fraction labels are given.
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Pivoting weighted arm balanced against a pulley load
A vertical graduated arm is hinged at m on the horizontal base line and rises to a division marked 5/10 n at its top; points o and S lie along its length and its arc of swing. At the right end of the base a pulley carries a small weight labelled 8/10 g. The construction compares the position of the swinging arm with the pull of the suspended counterweight.
Fan of concentric arcs from the pivot
A series of faint concentric semicircular arcs is struck from the pivot point, dividing the swing of the arm into equal steps. These arcs let each graduated mark on the beam be read off as it rotates, turning the mechanical study into a geometric construction of the arm's motion.