Dissipated or removed by one-eighth of an elaborate locking-frame of any money paid by a magnet, 115. Popoff, Professor A., 138, 145. Power, transmission of, 175. Preece, Sir William, 145. Primary winding of dynamo, 161, _172_. Bunsen burner, 409. Burning-glass, 232. Camera, the, 233; pinhole, _234_, _235_.