| 释义 |
nonius|ˈnəʊnɪəs|
[mod.L., being the latinized form of the name of Pedro Nuñez, a Portuguese mathematician (1492–1577).]
A contrivance for the graduation of mathematical instruments, invented by Nuñez and described by him in his work De Crepusculis (1542 a.d.). Often inaccurately used for the vernier, which is an improved form of Nuñez' instrument.
1750Phil. Trans. XLVI. 515 In this Method another Observer will be generally necessary to note the Degree cut by the Nonius. 1781M. Cutler in Life, etc. (1888) I. 86, I went to Salem to get a nonius fitted to my barometer. 1804Ct. von Rumford in Phil. Trans. XCIV. 78 Their scales were divided with the greatest care; and, by means of a nonius, they show eighth parts of a degree very distinctly. 1881A. de S. Pinto How I crossed Africa II. ii. ii. 160, I read in the nonius 50° 10′.
b. attrib., as nonius plate, nonius scale, nonius screw.
1732Phil. Trans. XXXVII. 274 The Nonius Plate moves with the Index, and subdivides each of the small Divisions of the Arch into ten equal Parts or Minutes. 1837Brewster Magn. 350 The lever or clamp, connected with the nonius screw on one of the deflectors. 1867Smyth Sailor's Word-bk., Nonius Scale, or Vernier. |