英语词汇“repeating circle”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

5. Designating an instrument for measuring angles in which accuracy is obtained by observing and measuring an angle repeatedly round a graduated circle, and then taking the average of the results; chiefly in repeating circle. Also: designating other instruments using the same principle (now rare). Now historical.The repeating circle is associated esp. with the name of J. C. de Borda (1733–99), who proposed a modification of the reflecting circle ( J. C. de Borda Description et usage du cercle de réflexion: avec différentes méthodes pour calculer les observations nautiques (1787)).

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the world > relative properties > measurement > measuring instrument > [noun] > for measuring angles

protractor1602

recipiangle1728

goniometer1766

trigonometer1767

repeating circle1799

angulometer1817

sine bar1915

1799 Jrnl. Nat. Philos. Oct. 320 The observers made use, for the measurement of every kind of angles, of the entire circle of Borda, which is justly called the repeating circle.

1811 J. Black tr. A. von Humboldt Polit. Ess. New Spain I. p. vi It is to be wished that a traveller..provided with a sextant, or a small repeating circle of reflection..should travel in three directions over the north of the kingdom of New Spain.

1822 Mem. Astron. Soc. 1 33 The repeating circle, till within these few years, has been very little used in this country.

1829 W. Pearson Pract. Astron. II. 513 A repeating instrument of the simplest construction.

1841 Penny Cycl. XIX. 399/2 A watch telescope can scarcely be applied to a repeating theodolet, and we think that the repeating tripod may be so made as to be free from any objection.

1929 Sci. Monthly Nov. 404/2 The French have since been partial to the use of repeating instruments in their triangulation while the English have clung to the direction instrument.

1988 H. A. Klein Sci. Measurem. ix. 114 These premetric meridian measurers used special ‘repeating circles’ that had been designed by Borda and were calibrated..in terms of the grade.

2002 N.Y. Times Bk. Rev. 13 Oct. 12/1 Each astronomer would map a chain of triangles straddling a line of longitude, extending from Dunkirk south to Barcelona... The measurements were made with ‘repeating circles’, brass masterpieces of 18th-century technology.

单词	repeating circle
释义	> as lemmas repeating circle 5. Designating an instrument for measuring angles in which accuracy is obtained by observing and measuring an angle repeatedly round a graduated circle, and then taking the average of the results; chiefly in repeating circle. Also: designating other instruments using the same principle (now rare). Now historical.The repeating circle is associated esp. with the name of J. C. de Borda (1733–99), who proposed a modification of the reflecting circle ( J. C. de Borda Description et usage du cercle de réflexion: avec différentes méthodes pour calculer les observations nautiques (1787)). ΘΚΠ the world > relative properties > measurement > measuring instrument > [noun] > for measuring angles protractor1602 recipiangle1728 goniometer1766 trigonometer1767 repeating circle1799 angulometer1817 sine bar1915 1799 Jrnl. Nat. Philos. Oct. 320 The observers made use, for the measurement of every kind of angles, of the entire circle of Borda, which is justly called the repeating circle. 1811 J. Black tr. A. von Humboldt Polit. Ess. New Spain I. p. vi It is to be wished that a traveller..provided with a sextant, or a small repeating circle of reflection..should travel in three directions over the north of the kingdom of New Spain. 1822 Mem. Astron. Soc. 1 33 The repeating circle, till within these few years, has been very little used in this country. 1829 W. Pearson Pract. Astron. II. 513 A repeating instrument of the simplest construction. 1841 Penny Cycl. XIX. 399/2 A watch telescope can scarcely be applied to a repeating theodolet, and we think that the repeating tripod may be so made as to be free from any objection. 1929 Sci. Monthly Nov. 404/2 The French have since been partial to the use of repeating instruments in their triangulation while the English have clung to the direction instrument. 1988 H. A. Klein Sci. Measurem. ix. 114 These premetric meridian measurers used special ‘repeating circles’ that had been designed by Borda and were calibrated..in terms of the grade. 2002 N.Y. Times Bk. Rev. 13 Oct. 12/1 Each astronomer would map a chain of triangles straddling a line of longitude, extending from Dunkirk south to Barcelona... The measurements were made with ‘repeating circles’, brass masterpieces of 18th-century technology. extracted from repeatingadj. < as lemmas
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