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单词 gunter's chain
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Gunter's chain
a. In the name of several mathematical instruments improved or invented by Gunter. Gunter's chain: the chain of 4 poles' length now in general use for land-surveying (see chain n. 9). Gunter's line: a logarithmic line on Gunter's scale used for performing mechanically the operations of multiplication and division; also called Gunter's proportion. Gunter's quadrant: an apparatus for finding the hour of the day, the azimuth, etc. Gunter's rule, Gunter's scale = 1b.
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the world > the earth > earth sciences > geography > map-making > surveying > [noun] > surveying instruments > chain
chain1610
Gunter's chain1679
pole chain1725
the world > the earth > earth sciences > geography > map-making > surveying > [noun] > surveying instruments > rule
Gunter's rule1679
Gunter's scale1679
Gunter1706
the world > the universe > cosmology > science of observation > astronomical instruments > measuring altitude > [noun] > quadrant or sextant > quadrant > types of
back-staff1627
sinical quadrant1669
Gunter's quadrant1679
meridian quadrant1793
1679 J. Moxon Math. made Easie 61 Gunter's Chain, Quadrant, Rule, Scale, and Sector, all useful Mathematical Instruments, invented or much improved by..Mr. Edmund Gunter..and from him bearing their names.
1688 J. Brown (title) The description and vse of the carpenters-rule: together with the vse of the line of numbers commonly called Gunters-line. Applyed to the measuring of all superficies and solids.
1701 T. Tuttell Descr. Math. Instruments in J. Moxon Math. made Easie 9 Gunter's Quadrant,..made in Wood or Brass, Curiously contrived to find the Hour..and Azimuth, and most Propositions of the Globe; also, the Height of Trees, Steeples, &c.
1706 Phillips's New World of Words (new ed.) Gunter's Line, the common Line of Numbers first invented by Mr. Edmund Gunter, and so well known that it needs no Description.
1728 E. Chambers Cycl. Gunter's Line, call'd also Line of Lines, and Line of Numbers, is a graduated Line usually placed on Scales, Rules, Sectors, &c.
1749 B. Franklin Let. 29 July in Exper. Electricity (1751) 66 Two pieces of thick looking-glass, as broad as a Gunter's scale, and 6 inches long.
1798 C. Hutton Course Math. II. 50 Land is measured with a chain, called Gunter's Chain..of 100 equal links; and the length of each link is therefore..7·92 inches.
1890 Dict. National Biogr. XXXIII. 350 Gunter's admirable rule of proportion, now called the line of numbers (‘Gunter's Line’ and ‘Gunter's Proportion’), and other lines laid down by it were fitted in the scale, which ever since has been called ‘Gunter's Scale’.
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更新时间:2024/12/23 19:43:20