# TURN

, is used for a circular motion; in which sense it agrees with revolution.

Turn, in Clock or Watch-work, particularly denotes the revolution of a wheel or pinion.

In calculation, the number of Turns which the pi- nion hath, is denoted in common arithmetic thus, 5) 60 (12, where the pinion 5, playing in a wheel of 60, moves round 12 times in one Turns of the wheel. Now by knowing the number of Turns which any pinion hath, in one Turn of the wheel it works in, you may easily find how many Turns a wheel or pinion has at a greater distance; as the contrat-wheel, crownwheel, &c, by multiplying together the quotients, and the number produced is the number of Turns, as in the example here annexed: the first of

5) | 55 | (11 |

5) | 45 | ( 9 |

5) | 40 | ( 8 |

*work,*and PINION.

TURNING *to windward,* in Sea Language, denotes
that operation in sailing when a ship endeavours
to make a progress against the direction of the wind,
by a compound course, inclined to the place of her
destination.—This method of navigation is otherwise
called *plying to windward.*

TUSCAN *Order,* in Architecture, is the first, the
simplest, and the strongest or most massive of any. Its
column has 7 diameters in height; and its capital,
base, and entablement, have no ornaments, and but few
mouldings.

TWELFTH-*Day,* the festival of the Epiphany, or
the manifestation of Christ to the Gentiles, so called,
as being the Twelfth day, exclusive, from the nativity
or Christmas-day; of course it falls always on the 6th
day of January.