Circle diagram constant air-gap induction motor images shown here, where, The circle diagram is drawn using the data obtained from no load and either short circuit or, in case of machines, blocked rotor tests by fitting a half-circle in points O and A. Beyond the error inherent in the constant air-gap assumption, the circle diagram introduces errors due to rotor reactance and rotor resistance variations caused by magnetic saturation and rotor frequency over the range from no-load to operating speed. Steinmetz equivalent circuit Circle diagram First conceived by A. Heyland in 1894 and B.A. Behrend in 1895, the circle diagram is the
A Pretty Girl Is Like a Melody scene usually understood as an earnest hymn to feminine pulchritude had an unmistakably comic element". Several of Berlin's later "Follies" songs, including "The Girls of My Dreams" and "Say It With Music", have been described as having been "cloned" from "A Pretty Girl Is Like A Melody". In the 1960s "Mad" magazine published a collection of parody lyrics of well-known songs, including "Louella Schwartz Describes Her Malady"; in Irving Berlin et al. v. E.C. Publications, Inc. the United States Court of Appeals for the Second Circuit ruled that this did not violate Berlin's copyright. The album "69 Love Songs" includes