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Clocks: composite pendulum, side and front view with details. Engraving by Mutlow.

Inventions: various items including fountains, a Greek-key fret, and a fourchee. Engraving by T. Jeffrys.

Clocks: diagrams of the motions of composite pendulums. Engraving by Mutlow.

Clocks: an escapement mechanism (top), and a pendulum (below). Engraving by E. Kennion after C. Varley.

Clocks: two composite pendulums, and diagrams of their motions. Coloured engraving by J. Pass, 1809.

Clocks: various types of clock mechanism. Engraving by J. W. Lowry.

Inventions: various items including a fountain-pen, a pendulum, and a pantograph. Engraving by T. Jeffrys.

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Clocks: diagrams of the motions of composite pendulums. Engraving by Mutlow.

Clocks: an escapement mechanism (top), and a pendulum (below). Engraving by E. Kennion after C. Varley.

Clocks: various types of clock mechanism. Engraving by J. W. Lowry.

Clocks: composite pendulum, side and front view with details. Engraving by Mutlow.

Inventions: various items including a fountain-pen, a pendulum, and a pantograph. Engraving by T. Jeffrys.