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graphometer
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Graphometer - Wikipedia
The graphometer, semicircle or semicircumferentor is a surveying instrument used for angle measurements. It consists of a semicircular limb divided into 180 ...
en.wikipedia.org
en.wikipedia.org
Graphometer | Smithsonian Institution
A graphometer consists of a graduated semicircle with a pair of sight vanes at either end, and a movable alidade with another pair of sights at either end. The ...
www.si.edu
www.si.edu
Graphometer | The Małopolska Virtual Museums
A graphometer is a measuring instrument used for the measurement of angles, consisting of a semicircular limb, two alidades and a compass.
muzea.malopolska.pl
muzea.malopolska.pl
graphometer
graphometer (grəˈfɒmɪtə(r)) Also 8 -metre. [ad. F. graphomètre (1597 in Hatz.-Darm.), f. as prec. + µέτρον measure.] A mathematical instrument, used for measuring angles in surveying; otherwise called a semi-circle. † Also, a goniometer used in crystallography.1696 Phillips, Graphometer. 1712 J. Jam...
Oxford English Dictionary
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Semicircles - Compleat Surveyor
The Graphometer/Semicircle is similar in principle to a simple theodolite, but with a semicircle divided into degrees instead of a full circle.
www.compleatsurveyor.com
www.compleatsurveyor.com
Graphometer - the homepage of Nicolàs de Hilster, PhD
Invented in 1597 by Frenchman Philippe Danfrie, instruments like these have been used for land surveying since the late 16th century until the late 19th and ...
www.dehilster.info
www.dehilster.info
Graphometer | Royal Museums Greenwich
A graphometer is a surveying instrument used to measure horizontal angles, with a scale marked in half degrees and vernier reading to one minute of arc.
www.rmg.co.uk
www.rmg.co.uk
Graphometer - Inventions
Instrument described by Philippe Danfrie, which may be seen as a half compass. The magnetic needle and the diopter are found in fact at the centre of a ...
redi.imss.fi.it
redi.imss.fi.it
Graphometer - Museo Galileo
The graphometer, made by 'Ring' in Berlin in the 18th cent, is made of brass, 290mm long, and used to measure position angles in surveying.
catalogue.museogalileo.it
catalogue.museogalileo.it
Graphometer | Smithsonian Institution
Like a standard graphometer, this one has a graduated semicircle, a pair of fixed sights, and an alidade with sights at either end. The semicircle is graduated ...
www.si.edu
www.si.edu
An Enigmatic Device from Denmark - Communications of the ACM
“A graphometer consists of a graduated semicircle with a pair of sight vanes at either end, and a movable alidade with another pair of sights at ...
cacm.acm.org
cacm.acm.org
Cochleoid
The American Mathematical Monthly, Vol. 31, No. 5 (May, 1924), pp. 222–227 (JSTOR)
Howard Eves: A Graphometer.
wikipedia.org
en.wikipedia.org
semicircle
semicircle (ˈsɛmɪsɜːk(ə)l) [ad. L. sēmicirculus: see semi- 7 b and circle n.] 1. The half of a circle divided by a diameter, or the half of its circumference.1526 A C. mery talys 3 b, [Oxford scholar loq.] Cobler I pray the set me .ii. tryangyls & .ii. semy cercles vppon my subpedytals. 1551 Recorde...
Oxford English Dictionary
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Circumferentor
See also
Graphometer
Alidade
References
"Circumferentor". Oxford English Dictionary. Oxford University Press. 2nd edition. 1989.
wikipedia.org
en.wikipedia.org
graphometric
▪ I. graphoˈmetric, a.1 [f. prec. + -ic.] Pertaining to or ascertained by a graphometer.In mod. Dicts. So graphoˈmetrical a.1 = prec.1828–32 in Webster; and in later Dicts.▪ II. graphoˈmetric, a.2 (n.) Math. [f. grapho- (taken as comb. form of graphic, in sense 5 b) + metric.] Applied by Clifford to...
Oxford English Dictionary
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