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Manufactured niddy-noddies can be made of different sizes, producing skeins from 12 inches in length to 4 feet in length. The most common size, however, produces a two-yard skein. [3] Very small niddy-noddies are generally used for small samples. Many spinners will spin a sample length of yarn, ply it, and skein it using a niddy-noddy before ...
The literal meaning of Crois-iarna in English is yarn-cross, which perfectly describes the tool used for winding a measured length of spun and plied yarn. The yarn is wound around the crois-iarna (or niddy-noddy) off a spinning wheel's bobbin, to make a measured hank or skein of yarn used for knitting or weaving.
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The Lansdowne Madonna (left) and the Buccleuch Madonna (right) at the monumental 2019–2020 exhibition Léonard de Vinci at the Louvre, Paris.. The composition of the Madonna of the Yarnwinder shows the Christ child twisting his body away from his mother's embrace, his eye caught by her niddy-noddy whose arms (crosspieces) give it the shape of a cross; he precociously recognises it as a ...
Especially in steam days, wheel arrangement was an important attribute of a locomotive because there were many different types of layout adopted, each wheel being optimised for a different use (often with only some being actually "driven"). Modern diesel and electric locomotives are much more uniform, usually with all axles driven.
Van de Graaff generator diagram. A simple Van de Graaff generator consists of a belt of rubber (or a similar flexible dielectric material) moving over two rollers of differing material, one of which is surrounded by a hollow metal sphere. A comb-shaped metal electrode with sharp points (2 and 7 in the diagram), is positioned near each roller ...
Simplified diagram of how a tonewheel works Goldschmidt tone wheel (1910), used as an early beat frequency oscillator. A tonewheel or tone wheel is a simple electromechanical apparatus used for generating electric musical notes in electromechanical organ instruments such as the Hammond organ and in telephony to generate audible signals such as ringing tone.