Excerpt from Practical Electricity and Magnetism
In bringing before the public these laboratory manuals, it has been the object of the authors to provide a course of instruction for carrying out a progressive series of experiments in Physics and Electrical Engineering, arranged so that the usual apparatus at the disposal of a laboratory, though not especially designed for any particular experiment, may nevertheless be used with advantage in a variety of ways.
Able courses of instruction in experimental work have already appeared, and have done a vast amount of good; but as these usually require expensive apparatus made and arranged for each experiment, they have not become so generally useful as otherwise might have been the case, especially in such instances where the scope of the work undertaken, precludes all possibility of separate and special apparatus being provided for each independent experiment. In technical work this is more particularly the case, seeing that in actual practice a set of instruments must be put to very divergent uses, in order that results may be obtained quickly and with sufficient accuracy for commercial work. This use of apparatus for ends not specially intended, is in itself a training of considerable importance, to any student who will afterwards, in his daily life, have to so adapt for different purposes, such instruments as may be available at the time.
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