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In measurement, the Coggeshall slide rule, also called a carpenter's slide rule, was a slide rule designed by Henry Coggeshall in 1677 to help in measuring the dimensions, surface area, and volume of timber. With his original design and later improvements, Coggeshall's slide rule brought the tool its first practical use outside of mathematical study. It would remain popular for the next few centuries.

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  • Regla de cálculo Coggeshall (es)
  • Coggeshall slide rule (en)
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  • In measurement, the Coggeshall slide rule, also called a carpenter's slide rule, was a slide rule designed by Henry Coggeshall in 1677 to help in measuring the dimensions, surface area, and volume of timber. With his original design and later improvements, Coggeshall's slide rule brought the tool its first practical use outside of mathematical study. It would remain popular for the next few centuries. (en)
  • La regla de cálculo Coggeshall, también llamada la regla de cálculo del carpintero, era una regla de cálculo diseñada por Henry Coggeshall en 1677 para facilitar el medir longitudes, superficies, y la solidez de los maderos. Con su original diseño y posteriores mejoras, la regla de cálculo Coggeshall trajo este tipo de herramientas a su primer uso práctico fuera del estudio matemático. Seguiría siendo popular en los próximos siglos.​ (es)
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  • La regla de cálculo Coggeshall, también llamada la regla de cálculo del carpintero, era una regla de cálculo diseñada por Henry Coggeshall en 1677 para facilitar el medir longitudes, superficies, y la solidez de los maderos. Con su original diseño y posteriores mejoras, la regla de cálculo Coggeshall trajo este tipo de herramientas a su primer uso práctico fuera del estudio matemático. Seguiría siendo popular en los próximos siglos.​ Consistió en dos reglas, cada una de 3 dm de largo, que fueron enmarcadas, o puestas juntas, de varias maneras. A veces fueron hechas para deslizarse una con la otra. A veces fue hecha una ranura al lado de una regla de empalme común de 6 dm, y era insertada una delgada pieza deslizante, con las líneas de Coggeshall agregadas en ese lado. Pero la manera más usual y práctica, era tener una de las reglas deslizándose a lo largo de un surco hecho a lo largo del centro de la otra, como se muestra en la figura abajo.​ Coggeshall describió primero este aparato en un papel que publicó en Londres titulado, "Medida de madero por una línea de más facilidad, rapidez y exactitud, que cualquier otra manera en uso, por una doble escala: después de la medición contando, por la longitud y el cuarto de la circunferencia en madero redondo, y por la longitud y el lado del cuadrado en madero cuadrado, y del cuadrado igual en madero plano : como también medida de piedra y calibrado de recipientes por la misma cercana y exacta manera, además una escala diagonal de 100 partes en un cuarto de una pulgada, ambas muy fáciles de hacer y usar".​ Después de mejorar el diseño, republicó su trabajo bajo el título "Un Tratado de Medidas con una Regla de Dos Pies, que se desliza hacia un Pie" (1682). Editó una versión muy modificada en 1722 titulada "El Arte de Medición Práctica realizada fácilmente por una Regla de Dos Pies que se desliza a un Pie". Antes de 1767, siete revisiones habían sido editadas.​ (es)
  • In measurement, the Coggeshall slide rule, also called a carpenter's slide rule, was a slide rule designed by Henry Coggeshall in 1677 to help in measuring the dimensions, surface area, and volume of timber. With his original design and later improvements, Coggeshall's slide rule brought the tool its first practical use outside of mathematical study. It would remain popular for the next few centuries. The Coggeshall rule consisted of two rulers, each a foot (30 cm) long, which were put together in various ways. The most common and convenient arrangement was to have one of the rulers slide within a groove made along the middle of the other, like an ordinary linear slide rule, as shown in the figure below. Another form had one ruler sliding alongside the other, and a third form had a common two-foot folding ruler with a groove along one side in which a thin sliding piece was inserted that carried Coggeshall's lines. Coggeshall first described this apparatus in a paper he released in London titled, "Timber-measure by a line of more ease, dispatch and exactness, then any other way now in use, by a double scale : after the countrey-measure, by the length and quarter of the circumference in round timber, and by the length and side of the square in squared timber, and square equal in flat timber : as also stone-measure and gauging of vessels by the same near and exact way, likewise a diagonal scale of 100 parts in a quarter of an inch, very easie both to make and use." After improving the design, he republished his work under the title "A Treatise of Measuring by a Two-foot Rule, which slides to a Foot" (1682). He released a highly modified version in 1722 titled "The Art of Practical Measuring easily performed by a Two-foot Rule which slides to a Foot." By 1767, seven revised editions had been released. (en)
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