Needles


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Needles

 

small slender instruments widely used in sewing and knitting, medicine, printing, and other industries. There are needles for machine and hand sewing. Machine needles are usually cylindrical in form with a conical point; sometimes they have special points to cut openings in various shapes, including oval, rhomboid, triangular, and square (for leather, oilskin, and impregnated fabrics). Needles may be straight or bent. Some needles have a hook at the sharp end instead of an eye. They are manufactured in various sizes (0.25– 4.0 mm in diameter) and numbered accordingly: the numbering is based on needle diameter and expressed in hundredths of a millimeter (no. 60 is 0.60 mm in diameter, no. 120 is 1.20 mm). Hand needles are classified by number according to length and diameter—for example, no. 1 to no. 9 needles range in thickness from 0.6 to 1.0 mm and in length from 30 to 50 mm.

An engraving needle is a fine steel rod (like an ordinary sewing needle, but with a point shaped like a cone, a truncated cylinder, or a blade) set into a wooden handle. It is a basic tool in etching, drypoint engraving, and engraving on cardboard, and it is an auxiliary tool in lithography and mezzotinting.


Needles

 

the needlelike or scaly leaves of many coniferous trees and shrubs. Needles are well adapted to the unfavorable conditions of hot summers and cold winters. They are usually perennial, falling from the tree gradually. The epidermis has a thick cuticle; the stomata are submerged. The pulp consists of parenchymal cells with chlorophyll granules; in pines the cell walls form intracellular outgrowths and folds that increase the photosynthesizing surface of the leaf. In the center of each needle are one or two conducting bundles. The needles of many species contain resin canals. The needles discharge into the atmosphere special substances called phytoncides, which influence the composition of the atmospheric microflora. Fallen needles form a slowly decomposing forest floor. The needles of certain trees are used to obtain fir and other oils, vitamins, meal (pine, spruce), and plant fiber.

needles

Flying the aircraft strictly by reference to the needles on the navigation instruments.
References in classic literature ?
Perhaps in time she may grow accustomed to work with her needle, but, whatever happens, I have secured her future.
Yes, a little--but not on land--and not with needles--' Alice was beginning to say, when suddenly the needles turned into oars in her hands, and she found they were in a little boat, gliding along between banks: so there was nothing for it but to do her best.
cried the Sheep, as she took up another pair of needles.
on my bench in this corner against the wall, where her blue eyes can shine upon you,' pursued Miss Wren, doing so, and making two little dabs at him in the air with her needle, as if she pricked him with it in his own eyes; 'and I defy you to tell me, with Mrs T.
Women derive a pleasure, incomprehensible to the other sex, from the delicate toil of the needle.
But I've got a needle and thread in the knapsack and I'll sew you up again.
Give him the needle and thread and let him mend his ways.
As she entered the Shaws' parlor an hour or two later, an appalling array of well-dressed girls appeared, each provided with a dainty reticule, basket, or bag, and each tongue going a good deal faster than the needle, while the white fingers stitched sleeves in upside down, put flannel jackets together hind part before, or gobbled button-holes with the best intentions in life.
It was funny to see the look the three tall lads cast at the little person sedately threading a needle with green silk.
It is needless for me to tell you how miserably work of that sort is remunerated: you have read about it in the newspapers.
Natalie dropped her needle and thread, and hid her face in her hands.
I have a needle, Sir, in my basket, and thread too.