"Convex" Quotes from Famous Books
 ... say, A curved line. If they are then asked how they may know it is D, they will say, Because it is made of a perpendicular line and has a curved line behind. Further information may then be given. Turn the D letter up thus , and say, I want to teach you the difference between concave and convex: the under part of the curve is concave and the upper part of it is convex. Then say, I shall now take the letter away, and wish you to shew me concave and convex on one of your fingers; when they will bend the forefinger and point them both out on it. Go on with the other letters ...
— The Infant System - For Developing the Intellectual and Moral Powers of all Children, - from One to Seven years of Age • Samuel Wilderspin
... gives us an example of a good, clearly-defined and expressive thought-form, with each colour well marked off from the others. It represents the feeling of a man upon meeting a friend from whom he has been long separated. The convex surface of the crescent is nearest to the thinker, and its two arms stretch out towards the approaching friend as if to embrace him. The rose colour naturally betokens the affection felt, the light green shows the depth ...
— Thought-Forms • Annie Besant
... will look into the article 'Optics' in the Edinburgh Encyclopedia (vol. xv. p. 643), you will find an account of what has been previously done to reduce by one-half the length of reflecting telescopes. The advantage of substituting, as you propose, a convex for a plane mirror arises from two causes that a spherical surface is more easily executed than a plane one; and that the spherical aberration of the larger speculum, if it be spherical, will be diminished by the opposite ...
— James Nasmyth's Autobiography • James Nasmyth
... that the men of the Stone age exercised their talent. Many and varied are the subjects which have been found engraved on plaques of ivory or on stone, and incised on bears' teeth or on stag horn. We represent one forming the hilt of a dagger (Fig. 36), and another representing a bear with the convex forehead, characteristic of the species, engraved on a piece of schist (Fig. 37), and a mammoth engraved on an ivory plaque with its long mane, trunk, and curved tusks (Fig. 38). The artist who depicted these animals with such faithful exactitude evidently lived ...
— Manners and Monuments of Prehistoric Peoples • The Marquis de Nadaillac
... portion of the lid fell clattering to the floor, and the three men and Miss Sally peered anxiously into the box. From it the Colonel tenderly lifted a nickel-plated cylinder, as tall as a man's knee and as large around as a leg of mutton. It had a convex top, and on one side a dial. From near the base a ...
— Kilo - Being the Love Story of Eliph' Hewlitt Book Agent • Ellis Parker Butler
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