Crystal Clear
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Explains the role of the quartz crystal in separating long-distance telephone calls and shows how man-made crystals are started, grown, and re-grown until the desired size is obtained. crystal growth is shown by time-lapse photography.
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Sources
- 16mm Filmography (legacy record) — title, creator, format, description, catalog record
- Wikidata · Q25634076 ↗ — year, genre
Original permalink · Record added 2024-04-22 21:27:20