Graduated markings, generally logarithmic, on slide rule
Keuffel and Esser 7" slide rule (5" scale, 1954)[1]
A slide rule scale is a line with graduated markings inscribed along the length of a slide rule used for mathematical calculations. The earliest such device had a single logarithmic scale for performing multiplication and division, but soon an improved technique was developed which involved two such scales sliding alongside each other. Later, multiple scales were provided with the most basic being logarithmic but with others graduated according to the mathematical function required.
Few slide rules have been designed for addition and subtraction, rather the main scales are used for multiplication and division and the other scales are for mathematical calculations involving trigonometric, exponential and, generally, transcendental functions. Before they were superseded by electronic calculators in the 1970s, slide rules were an important type of portable calculating instrument.
^"Slide Rule and Planimeter Sections". K&E Catalog 42nd Edition. Keuffel and Esser. 1954. p. 279. Archived from the original on 7 April 2021. Retrieved 25 June 2021.
finance typically feature additional scales that aid in specialized calculations particular to those fields. The sliderule is closely related to nomograms...
logarithmic scale to prevent them from expanding too rapidly and becoming too large to fit within a small graph. The markings on sliderules are arranged...
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calculations required greater accuracy than could be achieved with a sliderule. By turning multiplication and division to addition and subtraction, use...
wind triangle calculations using a rotating scale and a sliding panel. The other side is a circular sliderule. Extra marks and windows facilitate calculations...
measurement on a ruledscale, a dial, or an electronic digital display. A common association is to calipers using a sliding vernier scale. Some calipers...
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themselves: Excise Licence duty (the rate of which often varied depending on the scale of production) had to be paid in addition to any duty payable on the goods...
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The rule of thirds is a "rule of thumb" for composing visual images such as designs, films, paintings, and photographs. The guideline proposes that an...
at the scene stated, "When the slide hit the river, it was like a tsunami." A Washington state geologist stated the slide was one of the largest landslides...
versions have a built-in sliderule on the back. Sometime between 1666 and 1675, French polymath Claude Perrault invented the first slide calculator, called...
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