Word: convex
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Dates: during 1920-1929
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...will be used in future to measure pigskins put in play. The correct football will have "a circumference of its short axis from 22 to 22½ inches (a half inch less than last year), length of long axis from 11 to 11½ inches, entire surface to be convex, and inflated not more than 15 pounds, nor less than 13 pounds...
...Raditch, however, announced that he would address the peasants. They came on horseback and in carts from the ends of the country to hear him. He stood up before them, a most unprepossessing figure, ill-dressed, half his face concealed by a heavy beard, the other half by thick convex spectacles, for he was nearly blind. He talked to them rapidly, often allegorically and often inchoately. They gave him a reception so passionately loyal, so adoring that it was touching...
...Harvard telescope will be a reflector also, in which a concave mirror sixty inches in diameter replaces the convex lens of the more familiar, or refracting type. The mirror faces the star and, as it is concave, or dish-shaped, the light rays converge after being reflected from it. They are reflected to the side of the instrument by a second, flat mirror, in one type, and are brought to a focus on a photograph plate, or in an eyepiece, if the telescope is being used visually...
Last week the plump sausage-shaped area defended by Abd-el-Krim was severely French-fried on its convex southern exposure. Early in the week French confidence and enthusiasm, in both Paris and Morocco, reached extraordinary heights...
...south, the long convex side of the sausage, the French went into action, and there the fat was hottest and the frying was fiercest. After a heavy artillery barrage, the advance was begun. The trouble from the French standpoint was that they were advancing squarely towards the mountain ridge that forms the backbone of the Riff sausage and had to fight separately for every little foothill. Nonetheless, the losses apparently were not heavy, and an advance was made several miles deep on a 40-mile front. Thirteen of the blockhouses (the French advance posts before the campaign began...