Minute—The sixtieth part of a mean solar hour.
Minute Hand—The hand on a clock or watch which indicates the minutes. In the earlier days clocks had no minute hand. It was first concentered with the hour hand in 1673.
Minute Wheel—The wheel which carries the minute hand and is driven by the cannon pinion.
Minute Wheel Pin or Stud—The stud fixed to the plate on which the minute wheel pinion turns.
Minute Wheel Pinion or "Nut"—The pinion in watches on which the minute wheel is mounted and which drives the hour wheel.
Moment of Inertia—The resistance of a body in motion (or at rest) to a change in the velocity or direction of its motion. In a rotating body the sum of the products formed by multiplying the mass of each particle by the square of its distance from an axis.
Month—An arbitrary division of the year, varying in the number of days it contains, according to the calendar in use. See [Calendar].
Mortise—A slot or hole into which a tenon of corresponding shape is to be fitted.
Moseley, C. S.—A pioneer in the field of designing and building automatic watchmaking machinery. He invented some of the most delicate and complicated tools and mechanisms used in watch manufacture. He was early connected with the Waltham Co., master mechanic for the Nashua Co., during its brief history; and later general superintendent of the Elgin National Watch Company.
Motion—The wheels that carry the hands: cannon pinion, horn wheel and minute wheel and pinion.