与 «CIRCUMFERENTOR»相关的英语书籍
在以下的参考文献中发现
circumferentor的用法。与
circumferentor相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
Scientific Instruments, 1500-1900: An Introduction
A graphometer can be made with a full circle rather than a semicircle, and may
be confused with the circumferentor. The original form of Digges's theodolite, it
used open sights that were eventually replaced by telescopic sights. The
compass ...
*By the Circumferentor. TH E Box of the Circumferentor is divided into 360
Degrees, and numbred in 4 Quarters, from the North and South both to the East
and West, by the Figures 10, zo, 30, 40, yo, 60, 70, 80, 90, but these Divisions are
also ...
William Leybourn, Mr. Cunn (Samuel), 1722
3
A complete Treatise on practical Land-Surveying, etc. With ...
The great length of the magnetic needle increases the accuracy of the
circumferentor, for, ,if it were small, and consequently the graduations on the
brass circle proportionately small, the angle could not be read off with sufficient
accuracy.
Anthony NESBIT, Thomas BAKER (Civil Engineer.), 1855
4
A complete treatise on practical land-surveying, in all its ...
The great length of the magnetic needle increases the accuracy of the
circumferentor, for, if it were small, and consequently the graduations on the
brass circle proportionately small, the angle could not be read off with sufficient
accuracy.
5
The Civil-engineer & Surveyor's Manual: Comprising ...
6 X 2 right angles = 1080° By subtraction n° = 720° Having the Interior Angles, to
Reduce them to Circumferentor Bearings, and thence to Quarter Compass
Bearings. 214. Assume any line whose circumferentor bearing is given. Always
ketp ...
6
Nesbit's Practical Land-Surveying. Eleventh edition. (Field ...
TO SURVEY \VI'I'H THE CIRCUMFERENTOR. The circumferentor is sometimes
used in surveying. It consists of a flat bar of brass BB, about fifteen inches long,
with sights 00 at its opposite ends, and two narrow slits b, c for taking
observations ...
Anthony NESBIT, William BURNESS, 1870
7
Map Of A Nation: A Biography Of The Ordnance Survey
Roy's theodolite was a type called a circumferentor and consisted of an alidade
fixed to a compass; like most theodolites in the first half of the eighteenth century,
it did not contain a telescope. The instrument exploited the principle that light ...
8
The theory and practice of surveying: containing all the ...
If you take the bearing of any line with the circumferentor, that bearing will be the
number of degrees the line is from the north ; consequently the north must be a
like number of degrees from the line, and thus the north, and of course the south,
...
Robert Gibson, D. P. Adams, James Ryan, 1828
9
The Oxford Companion to the History of Modern Science
The surveying compass or circumferentor, a straightforward instrument based on
the magnetic compass, and in particular, the plane table, seemed to threaten the
carefully fostered new importance of the mathematicians ...
10
Instruments of Science: An Historical Encyclopedia
As a result, circumferentor cards usually have east and west transposed from the
familiar arrangement. The circumferentor was popular through the eighteenth
and into the nineteenth century, but it became increasingly associated with ...
Robert Bud, Deborah Jean Warner, 1998
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A day at the museum
It is a journey back in time, with circumferentor, pantographs and theodolites. They are among the old survey equipment exhibited at Survey ... «The Hindu, 五月 14»
Burwell name has deep roots in South Caradoc
The small, handheld circumferentor was the scientific tool of the day. On Sundays the men rested and washed their clothes. Colonel Burwell ... «Strathroy Age Dispatch, 七月 13»
Plane Table Mapping
... Surveyor to ufe, in that it performeth whatfoever may be done either by Theodolite, Circumferentor, Peractor, Perambulator, or any other graduated Inftrument, ... «POB, 五月 13»
