ENERGY IN OUR RIVERS
w, 16mm. Summary: Shows how natural waterfalls and man-made dams have made possible numerous hydro-electric projects in North America. A simplified cross-section diagram of a power plant is used to explain the function of turbines, generators, etc. Credits; Educational collaborator, Thomas F. Barton
Registration MP3710 No renewal found
- Term began
- 1948-11-17
- Claimant
- David A. Smart
- Class
- MP — published motion picture other than a photoplay (numbering series begun 1946)
- Finding
- no renewal entry found for 1975-1977 in the CCE motion-picture renewal sections
- In the public domain since
- 1 January 1977 (end of the 28th year, no renewal)
A renewal would have appeared in the Copyright Office's renewal registrations 27 to 29 years after the term began. Those volumes are loaded and no matching renewal was found. A work published 1931–1963 that was not renewed entered the public domain at the end of its 28th year.
A renewal had to be filed in the 28th year and would be listed in the 1975 or 1976 volume; volumes searched: 1975, 1976, 1977.
Catalog entry
Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1949, Internet Archive catalogofcopyri331213libr (OCR text), lines 4067–4085.
1948. 10 min., sd., b&w, 16mm. Summary: Shows how natural water- falls and man-made dams have made possible numerous hydro-electric projects in North America. A simpli- fied cross-section diagram of a power plant is used to explain the function of turbines, generators, etc. 10 Credits; Educational collaborator, Thomas F. Barton. © David A. Smart; 17Nov48; MP3710.
Copies on the Internet Archive
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