Nonius

Rigid props are differentiated from yielding props according to the operating principle: rigid props, for example threaded and nonius-props, can only react to increased compressive loads when a wooden bar permits deformation, otherwise they collapse when the maximum load is exceeded. ❋ Unknown (1993)

Fig.: Nonius-prop, in which the nonius serves to increase the setting load of the otherwise rigid prop. Source: ❋ Unknown (1993)

The nonius, never in common use, consisted essentially of forty-six concentric circles divided into quadrants by two diameters at right angles to each other, each quadrantal arc being divided into equal parts, the number of parts diminishing from ninety for the outermost arc to forty-five for the innermost. ❋ 1840-1916 (1913)

The name vernier, now commonly applied to a small movable scale attached to a sextant, barometer, or other graduated instrument, was given by Lalande who showed that the previous name nonius, after Peter Nunez, belonged more properly to a different contrivance. ❋ 1840-1916 (1913)

"Its proper term is a nonius, because Nonius was its inventor and Vernier took the idea from him." ❋ Simon Newcomb (1872)

ON THE THEORY OF WINDS. equal parts; and therefore, if this line be used as a line of chords, the nonius will divide the degree into 12 parts or 5 minutes. ❋ Unknown (1771)

The following method «which is only an application of the nonius division, is susceptible of even greater accuracy and minuteness than the diagonal method, and yet free from all its inconveniencies. — ❋ Unknown (1771)