. The principles underlying radio communication . will,when brought to rest, do an amount of work exactly equal tothat which was done in lifting it. For furthor information regarding dielectric power loss and proper-ties of insulating materials, see Bureau of Standards Circular 74. TheBureau of Standards will issue during 1922 publications giving detailedinformation regarding the properties of electrical insulating materialsof the laminated, phenol-methylene type. ELECTROMOTIVE FORCE. 45 The difference in level between floor and table may be ex-pressed in either of two ways—first, in the ordin


. The principles underlying radio communication . will,when brought to rest, do an amount of work exactly equal tothat which was done in lifting it. For furthor information regarding dielectric power loss and proper-ties of insulating materials, see Bureau of Standards Circular 74. TheBureau of Standards will issue during 1922 publications giving detailedinformation regarding the properties of electrical insulating materialsof the laminated, phenol-methylene type. ELECTROMOTIVE FORCE. 45 The difference in level between floor and table may be ex-pressed in either of two ways—first, in the ordinary way, bystating directly the vertical distance through which the bodywas raised; and second, by stating the amount of work re-quired to carry 1 pound of matter from the lower to the higherlevel. This difference in level, then, defines a very definitedifference in condition between the two positions. The higherposition, considered as a point in space, has a characteristicwhich distinguishes it from the lower position, and that is the \\b ^ 5. Dote Fi& 16 Fig I?. Smple Illustration of Potential enerqu due. to dilierence >tential Lnerqu. of head of two bodies of water 3}i


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