HathiTrust and The Online Books Page, 2026-10-08

The Online Books Page (script) [web: https://onlinebooks.library.upenn.edu/webbin/book/lookupname?key=Steinmetz%2C%20Charles%20Proteus%2C%201865-1923]

Lists about 43 Steinmetz titles with HathiTrust full-view records, among them: Systems of Electric Transmission and Distribution (1900); Investigation of some trouble in the generating system of the Commonwealth Edison Co., Chicago, 1919 (Lincoln Print. Co., 1920); The future of electricity (1910); a French translation of the Transient book (Théorie et calcul des phénomènes électriques de transition et des oscillations); Steinmetz electrical engineering library (1914); several editions of every textbook.

HathiTrust (Chrome) [web: https://catalog.hathitrust.org/Record/100699434; full text https://babel.hathitrust.org/cgi/pt?id=uiuo.ark:/13960/t0ks6mb3n]

Steinmetz, "Investigation of some trouble in the generating system of the Commonwealth Edison Co., Chicago, 1919" (68 page scans, public domain). In-text search "oscillation": 9 results. Snippets [web]: - p.17: the machine ahead in phase gives off power and drops back, the lagging one speeds up, "the phase difference between the machines reverses, and the machines thus oscillate against each other ... If there were no damping effects, this oscillation would continue with constant amplitude. Due to the damping effects exerted mainly by the lag of the field flux behind the resultant field excitation ... the amplitude of the oscillation steadily diminishes". - p.20: after machines drop into step, "a short oscillation of constant frequency of beats, but rapidly decreasing amplitude. Apparently, this is what happened in the trouble on September 18th, 1919." Bears on claim 2: a field investigation for a real utility in which Steinmetz applies his lag (hysteresis-type) reasoning to oscillation between alternator groups; in this report the lag of field flux appears as a damping effect. Investigator's reading, not in the snippet: this is the damping counterpart of the "reversed hysteresis loop" that supplies energy in Discharges, so the report may show how he decided the sign of the energy flow in a real case. A cookie banner was left untouched. Report not read beyond the search snippets.

Result: positive.