Lecture 3: Physiological Effects Of Radiation
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Radiation, Light and Illumination |
| Year | 1909 |
| Section ID | radiation-light-and-illumination-lecture-03 |
| Location | lines 2366-3638 |
| Status | candidate |
| Word Count | 9087 |
| Equation Candidates In Section | 28 |
| Figure Candidates In Section | 6 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”LECTURE III. PHYSIOLOGICAL EFFECTS OF RADIATION. Visibility. 20. The most important physiological effect is the visibility of the narrow range of radiation, of less than one octave, between wave length 76 X 10~6 and 39 X 1Q-6. The range of intensity of illumination, over which the eye can see with practically equal comfort, is enormous: the average intensity of illumination at noon of a sunny day is nearly one million times greater than the illumination given by the full moon, and still we can see fairly well in either case; that is, the human eye can adapt itself to enormous differences in the intensity of illumination, and that so perfectly that it is difficult to realize the differences in intensity without measuring them. The photo- graphic camera realizes it. An exposure taken in T^ secondSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”LECTURE III. PHYSIOLOGICAL EFFECTS OF RADIATION. Visibility. 20. The most important physiological effect is the visibility of the narrow range of radiation, of less than one octave, between wave length 76 X 10~6 and 39 X 1Q-6. The range of intensity of illumination, over which the eye can see with practically equal c ...Waves / transmission lines
Section titled “Waves / transmission lines”LECTURE III. PHYSIOLOGICAL EFFECTS OF RADIATION. Visibility. 20. The most important physiological effect is the visibility of the narrow range of radiation, of less than one octave, between wave length 76 X 10~6 and 39 X 1Q-6. The range of intensity of illumination, over which the eye can see with practically equal comfort, is enormous: the average intensity of illumination at noon of a sunny day is nearly one million times greater than the illumination given by th ...Ether references
Section titled “Ether references”... ife, and has been used from practical experience since by-gone ages. It means that the same relative or percent- age change in intensity of light, sound, etc., gives the same change of sensation, or in other words, doubling the intensity gives the same change in sensation, whether it is a change of intensity from one candle power to two candle power, or from 10 to 20, or from 1000 to 2000 candle power. It is obvious that the change of sensation is not proportional to the change of intensity; a change of intensity of light by one candle power gives a ...Field language
Section titled “Field language”... automatic action takes an appreciable, though short time, a flash light photograph shows the pupil of the eye fully open and thereby gives a staring impression to the faces which is avoided by keep- ing a photographically inactive light, as a candle, burning outside of the field of the camera when preparing for a flash light photo- graph. (2). By the fatigue of the optic nerves, exposed to high inten- sity of illumination, the nerves becomes less sensitive, while at low intensity they rest and thus become more sensitive, and the differences of sen ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Light | 196 | seeded |
| Radiation | 105 | seeded |
| Illumination | 54 | seeded |
| Frequency | 21 | seeded |
| Spectrum | 19 | seeded |
| Wave length | 17 | seeded |
| Ether | 4 | seeded |
| Ultra-violet radiation | 3 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
|---|---|---|
| ultra-violet | 41 | seeded |
| candle-power | 19 | seeded |
| wave length | 17 | seeded |
| ultra-red | 7 | seeded |
| ether | 4 | seeded |
Equation Candidates
Section titled “Equation Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
radiation-light-and-illumination-eq-candidate-0073 | 20. The most important physiological effect is the visibility of | line 2371 |
radiation-light-and-illumination-eq-candidate-0074 | wave length 76 X 10~6 and 39 X 1Q-6. | line 2373 |
radiation-light-and-illumination-eq-candidate-0075 | (3). By the logarithmic law of sensation. The impression made | line 2452 |
radiation-light-and-illumination-eq-candidate-0076 | PHYSIOLOGICAL EFFECTS OF RADIATION. 39 | line 2457 |
radiation-light-and-illumination-eq-candidate-0077 | 1 to 2, but the change of sensation in the first case, log 1000 = 3, | line 2464 |
radiation-light-and-illumination-eq-candidate-0078 | log 2 - 0.301. | line 2466 |
radiation-light-and-illumination-eq-candidate-0079 | PHYSIOLOGICAL EFFECTS OF RADIATION. 43 | line 2631 |
radiation-light-and-illumination-eq-candidate-0080 | distance of 100 feet, by going nearer to the lamps the orange | line 2664 |
Figure Candidates
Section titled “Figure Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
radiation-light-and-illumination-fig-021 | VIOLET FIG. 21. in the ultra-red and ultra-violet, where no power of radiation can produce visibility. It thus varies about as indicated in Fig. 22. | line 2582 |
radiation-light-and-illumination-fig-022 | the basis of equal ease in distinguishing objects. As the pur- FIG. 22. pose for which light is used is to distinguish objects, the correct comparison of lights obviously is on… | line 2618 |
radiation-light-and-illumination-fig-023 | v FIG. 23. meter candles (or rather log i) as abscissas, for red light, wave length 65.0; orange yellow light, wave length 59; bluish green | line 2694 |
radiation-light-and-illumination-fig-024 | \ FIG. 24. (1 meter-candle is the illumination produced by 1 candle power | line 2809 |
radiation-light-and-illumination-fig-025 | S FIG. 25. 62 for high intensities and changes in approximately the same range of intensities in which lwo changes; ks is also plotted in | line 2945 |
radiation-light-and-illumination-fig-026 | YELLOW GREEN FIG. 26. carbon filament would be somewhat like C. That is, the physio- | line 3036 |
Hidden-Gem Quote Candidates
Section titled “Hidden-Gem Quote Candidates”| Candidate ID | Candidate Passage | Source Location |
|---|---|---|
| No chapter-local candidates yet | - | - |
Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
- Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
- Ether references: Verify exact wording before drawing conclusions. Ether language must be separated from later interpretive systems.
- Field language: Read for whether field language is mechanical, geometrical, causal, descriptive, or simply a convenient engineering model.
- Transients / damping: Separate the temporary term from the final steady-state term and compare with differential-equation response language.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Radiation / light: Radiation and wave language can invite ether-field comparison, but source wording, modern radiation theory, and speculative synthesis must stay separated.
- Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
- Ether references: If Steinmetz mentions ether, quote only the verified source words first; any broader ether-field synthesis belongs in a labeled interpretive layer.
- Field language: Field-pressure or field-gradient interpretations can be explored here only after the explicit source passage and modern engineering translation are kept distinct.
- Transients / damping: Transient collapse, impulse, and surge behavior can be compared with alternative field language, but only as a clearly marked reading.
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.
- Move diagram candidates into the diagram archive only after image extraction, crop verification, and manifest creation.
- Keep Steinmetz wording, modern translation, and ether-field interpretation in separate labeled layers.