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| Clock. original: "Horologium" | page 1. |
| Oscillatory Clock, original: "Horologium Oscillatorium" or geometrical demonstrations concerning the motion of pendulums, adapted to clocks. | 15. |
| A Brief Instruction on the Use of Clocks, for finding longitudes. | 193. |
| A Controversy Concerning the Huygenian Determination of the Center of Oscillation. | 215. |
| Certain Machines, and various items concerning mechanics. | 249. |