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GRAPHOMETER

Graphometer

Surveying instrument for angle measurements

The graphometer, semicircle or semicircumferentor is a surveying instrument used for angle measurements. It consists of a semicircular limb divided into

Graphometer

List of surveying instruments

Alidade table Cosmolabe Dioptra Dumpy level Engineer's chain Geodimeter Graphometer Groma (surveying) Laser scanning Level Level staff Measuring tape Plane

List of surveying instruments

List_of_surveying_instruments

Theodolite

Optical surveying instrument

various other graduated circles (see circumferentor) and semicircles (see graphometer) were used to obtain either vertical or horizontal angle measurements

Theodolite

Cochleoid

Spiral curve of the form r = a*sin(θ)/θ

Monthly, Vol. 31, No. 5 (May, 1924), pp. 222–227 (JSTOR) Howard Eves: A Graphometer. The Mathematics Teacher, Vol. 41, No. 7 (November 1948), pp. 311–313

Cochleoid

List of measuring instruments

Device for measuring a physical quantity

see: Orders of magnitude (volume) Circumferentor Cross staff Goniometer Graphometer Inclinometer Mural instrument Plurimeter Protractor Quadrant Reflecting

List of measuring instruments

List_of_measuring_instruments

Jacques Canivet

French scientific instrument maker

to the Académie Royale des Sciences in Paris and produced compasses, graphometers, astronomical quadrants, transit instruments, drawing instruments, and

Jacques Canivet

Jacques_Canivet

Jacob's staff

Measurement tool

staff. These include: Cross-head, cross-sight, surveyor's cross or cross Graphometer Circumferentor Holland circle Miner's dial Optical square Surveyor's

Jacob's staff

Jacob's_staff

Alidade

Device that allows one to sight a distant object

in each vane. This type of alidade could be found on a plane table, graphometer or similar instrument. Alidades A and C are similar to B but have a slit

Alidade

Philippe Danfrie

probably best known as designer of the surveying instrument known as the graphometer. Danfrie was born in Cornouaille in Brittany. Danfrie went to Paris in

Philippe Danfrie

Philippe_Danfrie

List of Greek and Latin roots in English/H–O

barometric, bathometer, chronometer, diameter, diametric, dysmetria, graphometer, hexameter, hygrometer, hygrometry, isodiametric, isometric, isoperimetric

List of Greek and Latin roots in English/H–O

List_of_Greek_and_Latin_roots_in_English/H–O

James Kynvyn

Cathedral in London. He built high-quality mathematical instruments, notably graphometers, compasses, and quadrants. Wikimedia Commons has media related to James

James Kynvyn

James_Kynvyn

Circumferentor

Surveying tool to measure horizontal angles

used to stake out right angles, for example on a construction site. Graphometer Alidade Turner (1998). Scientific Instruments, 1500-1900: An Introduction

Circumferentor

El Palo Alto

Coast redwood in Palo Alto, California

Clara—15 mi (24 km) to the southeast. Font measured the tree with a graphometer: fifty varas (137 feet; 42 m) high and 5.5 varas (15 feet; 3 m) around

El Palo Alto

El_Palo_Alto

List of Greek and Latin roots in English/M

List of Greek and Latin roots in English starting with the letter M

barometric, bathometer, chronometer, diameter, diametric, dysmetria, graphometer, hexameter, hygrometer, hygrometry, isodiametric, isometric, isoperimetric

List of Greek and Latin roots in English/M

List_of_Greek_and_Latin_roots_in_English/M

Quadratrix of Hippias

Curve where spinning and moving lines cross

Story, Springer, p. 71, ISBN 3764360569 Eves, Howard (November 1948), "A graphometer", The Mathematics Teacher, 41 (7): 311–313, doi:10.5951/mt.41.7.0311

Quadratrix of Hippias

Quadratrix_of_Hippias

Pantometrum Kircherianum

1660 work by Gaspar Schott and Athanasius Kircher

copy of Pantometrum Kircherianum at the Bayerische Staatsbibliothek Graphometer Pantometrum Kircherianum, hoc est, instrumentum geometricum novum, à

Pantometrum Kircherianum

Pantometrum_Kircherianum

Ioan Mire Melik

Wallachian and Romanian polymath

quadrantulu de campania al D-lui Colonel de Artilerie A. Costiescu ("The Graphometer or Campaign Quadrant of the Artillery Colonel A. Costiescu"). In January

Ioan Mire Melik

Ioan_Mire_Melik

Land registry of Bertier de Sauvigny

Maps of the parishes of the generality of Paris surveyed from 1776 to 1791

other instruments appeared: the planchette bearing an alidade, the graphometer, the theodolite or the quarter-circle. However, it is likely that the

Land registry of Bertier de Sauvigny

Land_registry_of_Bertier_de_Sauvigny

René Grillet de Roven

French clockmaker and inventor

hygrometer (for which he was accused of plagiarism by another inventor); graphometers; drawing instrument set; protractor, set square, with plumb-bob. In 1690

René Grillet de Roven

René_Grillet_de_Roven