. How to make and use electricity ... tube, a little distance apart, so that the current will beobliged to traverse a part of the liquid. Close the circuit;bubbles of gas are immediately disengaged from the platinumstrips; soon the liquid around the — pole is turned green,while that around the f pole is turned red. Evidently de- USE ELECTRICITY. 25 composition of the sodium sulphate has taken place; anacid and an alkali are the results. This is called electrolysis. Prepare a solution of ccpper sulphate, and subject it to elec-trolysis, as in the last experment; copper collects on the—platinum,
. How to make and use electricity ... tube, a little distance apart, so that the current will beobliged to traverse a part of the liquid. Close the circuit;bubbles of gas are immediately disengaged from the platinumstrips; soon the liquid around the — pole is turned green,while that around the f pole is turned red. Evidently de- USE ELECTRICITY. 25 composition of the sodium sulphate has taken place; anacid and an alkali are the results. This is called electrolysis. Prepare a solution of ccpper sulphate, and subject it to elec-trolysis, as in the last experment; copper collects on the—platinum, and sulphuric acid and oxygen at the t the platinum strips and introduce the copper ter-. minals ; copper is now deposited on the — pole as before, butthe t pole wastes away. Although we can obtain a strong current and performmany neat experiments with a battery, still electricity would 26 HOW TO MAKE AND be of little value practically, were it not for the fact that it canbe converted into magnetism, and from magnetism to these two laws and principles are based all electrical ap-pliances. Obtain an insulated copper wire, wind twenty or more turnsaround a rod of very soft iron, four inches long by onequarter of an inch in thickness, and close the circuit. Bringa nail, (Figure 4) or other piece of iron, near the rod. The rodattracts the nail with much force, and this nail will attractother nails. The rod has acquired all the properties of amagnet. But the instant the circuit is broken, the iron losesits magnetic force, and the nails drop. The more times the wire is wound around the rod, withina certain limit, the more powerful is it magnetized. This ar-ran
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectricity, bookyear
