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A slide chart is a hand-held device, usually of paper, cardboard, or plastic, for conducting simple calculations or looking up information. A circular slide chart is sometimes referred to as a wheel chart or volvelle . Unlike other hand-held mechanical calculating devices such as slide rules and addiators, which have been replaced by electronic ...
Slide rule. Typical ten-inch (25 cm) student slide rule (Pickett N902-T simplex trig) A slide rule is a hand -operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry.
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.
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...
Slide whistle Diagram of a slide whistle. Sections: 1: mouthpiece, 2: fipple, 3: resonant cavity, 4: slide, 5: pull rod, 6: pipe. A slide whistle (variously known as a swanee or swannee whistle, lotus flute, [1] piston flute, or jazz flute) is a wind instrument consisting of a fipple like a recorder's and a tube with a piston in it.
The slide (Schleifer in German, Coulé in French, Superjectio in Latin) [1] is a musical ornament often found in baroque musical works, but used during many different periods. [1] It instructs the performer to begin two or three scale steps below the marked note and "slide" upward—that is, move stepwise diatonically between the initial and ...
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