Front Matter 1: Cover Letter to Samuel Insull
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Investigation of Some Trouble in the Generating System of the Commonwealth Edison Co. |
| Year | 1919 |
| Section ID | commonwealth-edison-generating-system-trouble-front-letter-01 |
| Location | PDF pages 1-7, lines 1-144 |
| Status | pdf-text-extracted-candidate |
| Word Count | 625 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 1 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”[[PDF_PAGE:1]] FOR PRIVATE CIRCULATION ONLY Investigation of some Trouble in the Generating System of the Commonwealth Edison Co. Chicago 1919 Charles P. Steinmetz, A. M., Ph. D. [[END_PDF_PAGE:1]] [[PDF_PAGE:2]] [[END_PDF_PAGE:2]] [[PDF_PAGE:3]] Investigation of some Trouble in the Generating System of the Commonwealth Edison Co. Chicago 1919 Charles P. Steinmetz, A. M., Ph. D. [[END_PDF_PAGE:3]] [[PDF_PAGE:4]] COPYRIGHT 1910 CHARLES P. STEINMETZ [[END_PDF_PAGE:4]] [[PDF_PAGE:5]] Schenectady, N. Y., December 19, 1919. Mr. S. Insull, Pres. Commonwealth Edison Company, Chicago, 111. My dear Mr. Insull: Enclosed I send you report of investigation of. some operating trou- bles in the generating system of the Commonwealth Edison Company, during 1919, with some recommendations. I am sending copies of the report to Mr. L. Ferguson and to Mr. R. F. Schuchardt. I regret that in some respects the report is not asSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Ether references
Section titled “Ether references”... ors, which would not interfere with the economic use of tie cables of substation feeder cables. 2.) The substations were originally operated by separate feeders, but the need of using the feeder cables and apparatus in the most eco- nomical manner has led to tying substations together on the same feeder, which necessarily increases the interference between substations and between generating stations in case of trouble, and further changes are contemplated and desirable. It therefore appears advisable to make a thorough study of substation operation with the v ...Impedance / reactance
Section titled “Impedance / reactance”... recommendations. I am sending copies of the report to Mr. L. Ferguson and to Mr. R. F. Schuchardt. I regret that in some respects the report is not as final and conclusive as I like to see it, but during the years of successful operation since the installation of the protective reactances, your system has grown and changed so much, and while I have received very complete and extremely satis- factory information and data from your engineers, it necessarily is not possible for me to be as fully familiar with the system, as I was once, but I hope that I shall now b ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Tie cable | 2 | pdf-text-extracted-candidate |
| Power limiting reactor | 1 | pdf-text-extracted-candidate |
| Protective reactance | 1 | pdf-text-extracted-candidate |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
|---|---|---|
| tie cable | 2 | pdf-text-extracted-candidate |
| power limiting reactor | 1 | pdf-text-extracted-candidate |
| protective reactance | 1 | pdf-text-extracted-candidate |
Equation Candidates
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| No chapter-local candidates yet | - | - |
Figure Candidates
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| No chapter-local candidates yet | - | - |
Hidden-Gem Quote Candidates
Section titled “Hidden-Gem Quote Candidates”| Candidate ID | Candidate Passage | Source Location |
|---|---|---|
commonwealth-edison-generating-system-trouble-quote-scaled-system-model | lines 121-132 |
Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Ether references: Verify exact wording before drawing conclusions. Ether language must be separated from later interpretive systems.
- Impedance / reactance: Translate historical opposition terms into modern impedance, admittance, conductance, susceptance, and complex-plane notation.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Ether references: If Steinmetz mentions ether, quote only the verified source words first; any broader ether-field synthesis belongs in a labeled interpretive layer.
Promotion Checklist
Section titled “Promotion Checklist”- Open the full source text and the scan or raw PDF.
- Verify the chapter boundary and surrounding context.
- Promote exact quotations only after checking the source image.
- Move mathematical candidates into canonical equation pages only after formula typography is corrected.
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- Keep Steinmetz wording, modern translation, and ether-field interpretation in separate labeled layers.