Ver"ni*er (?), n. [So named after the inventor, Pierre Vernier.] A short scale made to slide
along the divisions of a graduated instrument,
as the limb
of a sextant, or the scale of
a barometer, for indicating parts of divisions. It is so graduated that a certain convenient number of its divisions are just equal to a certain number, either one less or one more, of the
divisions of the instrument, so that parts of a
division are determined by observing what line on the vernier coincides with a line on the instrument.
Vernier calipers, Vernier gauge, a gauge with a
graduated bar and a sliding
jaw bearing a vernier, used for accurate measurements.
-- Vernier compass, a surveyor's compass with a vernier for
the accurate adjustment of the zero point in accordance with magnetic variation.
-- Vernier transit, a surveyor's transit instrument with a vernier compass.
Quotes From Classical Literature on 'vernier'You can hear pronunciation of the quotes if you click on  . The sound files tend to be pretty big.
 error of the Tower clock. After an elaborate explanation
by an officer then present upon the graduation of the
vernier and the manner of reading it, the cadet set the
finders so as to read the north polar distance of the
sun for that day at West Point apparent noon. When it
was about time for the sun' s limb to begin its transit
of the wires, the cadet took position to observe it. The
instructor was standing ready to record the times of
satisfaction which the clear geometrical proofs gave me. I remember, with
equal distinctness, the delight which my uncle gave me ( the father of
Francis Galton) by explaining the principle of the vernier of a barometer.
with respect to diversified tastes, independently of science, I was fond of
reading various books, and I used to sit for hours reading the historical
plays of Shakespeare, generally in an old window in the thick walls of the
school. I read also other poetry, such as Thomson' s 'Seasons,' and the
recently published poems of Byron and Scott. I mention this because later
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