...negative side ; a pith ball, under similar circumstances, moves in the same direction ; when a charged Jar is placed under the receiver of an air pump, and the air is exhausted, a luminous cloud flows from the positive to the negative side, in whichever way the Jar is electrified....

...negative side ; a pith ball, under similar circumstances, moves in the same direction ; when a charged Jar is placed under the receiver of an air pump, and the air is exhausted, a luminous cloud flows from the positive to the negative side, in whichever way the Jar is electrified....

...side ; a pith ball, under similar circcinstances, moves in the same direction ; when a charged Jar is placed under the receiver of an air pump, and the air is exhausted, a luminous cloud flows from the positive to the negative side, in whichever way the Jar is electrified....

...negative side ; a pith ball, under similar circumstances, moves in the same direction ; when a charged jar is placed under the receiver of an air pump, and the air is exhausted, a luminous cloud flows from the positive to the negative side, in which ever way the jar is electrified....

...negative side; a pith ball, under similar circumstances, moves in the same direction ; when a charged jar is placed under the receiver of an air pump, and the air is exhausted, a luminous cloud flows from the positive to the negative side, in whichever way the jar is electrified....

...the silk." "In the pupa state insects require very little air certainly ; yet it is found that when placed under the receiver of an air pump, and the air is withdrawn, the creature dies ; as he does also when plunged into oil ; while those which remain under...

...produced by aerial vibrations, can be experimentally verified in a number of ways. Thus if a bell be placed under the receiver of an air pump, and the air is gradually exhausted, the sound produced by the bell becomes fainter and fainter, and at last ceases...

...when in water, neglecting friction ? What if specific gravity were .4 ? 440. A body floating in water is placed under the receiver of an air pump and the air is exhausted. Will the depth to which the body sinks be altered ? Explain your answer fully. 441. A sinker, volume...

...weighing in a vacuum. This buoyancy can be shown experimentally by a balanced hollow sphere (Fig. 69). When it is placed under the receiver of an air pump and the air exhausted, the sphere shows itself to be heavier than its counterpoise. 127. Balloons.—The principle...

...held. A bladder, or India rubber bag, partially filled with air, and having the opening tightly closed, is placed under the receiver of an air pump and the air exhausted from the receiver, or jar in which the bladder is placed. The bladder immediately swells...