TransactionsPublished under the care of the General Secretary and the Treasurer . Fig. 3. Showing the resultant of a fundamental and a harmonic as inFig. 1, except that the phase of the harmonic has been shifted 60 deg. PHASE 90*. Fig. 4. Showing the resultant of a fundamental and a harmonic as inFig. 1, except that the phase of the harmonic has been shifted 90 deg. bychanging the coupling 15 deg. The wave form for peak and flat arehere alike except that the steeper side is in advance in the peak and theless steep side is in advance in the flat. Peak and flat are con-ventional terms, indicatin


TransactionsPublished under the care of the General Secretary and the Treasurer . Fig. 3. Showing the resultant of a fundamental and a harmonic as inFig. 1, except that the phase of the harmonic has been shifted 60 deg. PHASE 90*. Fig. 4. Showing the resultant of a fundamental and a harmonic as inFig. 1, except that the phase of the harmonic has been shifted 90 deg. bychanging the coupling 15 deg. The wave form for peak and flat arehere alike except that the steeper side is in advance in the peak and theless steep side is in advance in the flat. Peak and flat are con-ventional terms, indicating the phase of the harmonic. If the couplingwere shifted 15 deg. more the flat curve would become peaked. ROSA, LLOYD AND REID: INDUCTION METERS. 559 ously the current and voltage, was read by a telescope and means of a carbon rheostat the deflection of this instrumentwas maintained accurately constant while carrying alternatingcurrent during a set of runs on the meters. The wattmeter is ofthe dynamometer tj^ie and astatic. The fixed coils are strandedand wound on wooden spools and very little metal is used in theregion of the coils. The movable coils have very slight inductanceand every precaution is taken to avo


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