Gy/roscope

[Gk. gyros, a circle and skopein, to see.] An apparatus consisting of a heavy ro¬ tating disk mounted on gimbals, so that it can turn in any direction. When rotating it will constantly point to the same star, and may therefore be employed to show that the apparent rotation of the heavenly bodies is due to the rotation of the earth on its axis in the opposite direction. is made up of little cells, grows by forming new cells, the old ones being pre ed forward, and becoming a part of the shaft. Its color is said to be caused by a kind of oil which comes from the cells in the bulb. Porcupine quills, hedgehog spiues, and rhinoceros horn are all developments of hair. Straight hair is nearly round, but curly or crisp hair, like that of the negro, is flattened, and the hair of the Bushman in Africa is nearly as flat as a ribbon. Hair is very strong and very lasting. It is also very elastic or springy, and for this reason is much used for stuffing cushions, G,aFat-Cells.0t Human hair is also plaited into