Vernier scale

1631 Vernier scale

The book of science

Tom Sharp

Pierre Vernier metrology Vernier scale

Vernier scale

Vernier acuity

Training a straw man

Normal venier scales have a Venier constant of 0.02 and a main scale in millimeters, giving an accuracy of two hundreds of a millimeter.

See also in The book of science:

Readings in wikipedia: