A text-book on chemistry : for the use of schools and colleges . the cen-tral bell and back, alternately striking them. On a pivot, a, Fig. 85, suspend a bell jar having fourpieces of tin foil pasted on itssides, b c d; connect the jar, bymeans of the insulated wire y, withthe prime conductor, so that thepieces of tin foil may receivesparks. On the opposite side ar-range a conductor, x, in connectionwith the ground by a chain. Onputting the machine into activity,the jar will commence rotating on its pivot. Take a cake of sealing wax or gum lac, eight or teninches in diameter, and receive on it
A text-book on chemistry : for the use of schools and colleges . the cen-tral bell and back, alternately striking them. On a pivot, a, Fig. 85, suspend a bell jar having fourpieces of tin foil pasted on itssides, b c d; connect the jar, bymeans of the insulated wire y, withthe prime conductor, so that thepieces of tin foil may receivesparks. On the opposite side ar-range a conductor, x, in connectionwith the ground by a chain. Onputting the machine into activity,the jar will commence rotating on its pivot. Take a cake of sealing wax or gum lac, eight or teninches in diameter, and receive on its surface a few sparksfrom the prime conductor by bringing it near the blow upon its surface from a small pair of bellows,a mixture of flowers of sulphur and red-lead, which havebeen intimately ground together in a mortar. This mix-ture is of an orange color, but the moment it impinges onthe cake it is, as it were, decomposed ; the yellow sulphursettling on one portion, and the red-led on another, giv-ing rise to very curious and fantastical LECTURE XXVI. Laws of the Distribution of Electricity, and theGeneral Theories.—Distribution of Electricity.— Ona Sphere.—Ellipsoid.—Action of Points.—FranklinsDiscovery of the Identity of Electricity and Lightning.— The Leyden Jar.— The discharging Rod.— The Elec-tric Battery. When electricity is communicated to a conducting body,it does not distribute itself uniformly through the wholemass, but exclusively upon the surface; thus, if to the Explain the arrangement and cause of movement of the rotatory may powder of sulphur and red-load mixed together be separated?Does electricity distribute itself ou the surface or in the interior of bodies ? 106 DISTRIBUTION OF ELECTRICITY. Fig. 86.
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