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Abbey – Apparent Time

Abbey

To him or his assistant, Graham, is attributed the invention of the cylinder escapement.

The distance or space between the pitch line of a gear and the circle touching the ends of the teeth.

A device for testing the pull of the mainspring.

A compound of mercury with another metal; as an amalgam of tin.

Toothed wheels of irregular outline, used in transmitting variable motion, as shown in Fig. 7.

The positive pole of an electric current, that pole at which the current enters; opposed to cathode, the point at which it departs.

An axle or spindle on which a wheel turns.

ARC. Any given part of the circumference of a circle, or other curve.

To subject an ore, alloy or metallic compound to chemical examination in order to determine the amount of a particular metal contained in it.

See Balance.

Melt alum and dip the fractured faces into it; then put them together as quickly as possible. Remove the exuding mass with a knife.

Thos. Earnshaw, 8vo, London, 1836.

Historical Treatise on Horology.--Henderson, 8vo, London, 1836. Results of Experiments on the Vibration of Pendulums with different Suspending

Time as reckoned by the sun; the instant of the transit of the sun's center over the meridian constituting 12 o'clock.