Public Reel

LAWS OF MOTION

xplain the theory of Newton's three laws of motion— the phenomena of momentum and inertia, the concept of acceleration, and the theory of reciprocal attraction of all bodies. Shows everyday applications of these laws. Credits: Associate producer, Milan Herzog; collaborator, O. W. Eshbach. Kodachrome

Registration MP3341 No renewal found

Term began
1952-10-23
Claimant
Encyclopaedia Britannica Films, inc
Class
MP — published motion picture other than a photoplay (numbering series begun Jan. 1950)
Finding
no renewal entry found for 1979-1981 or in the Copyright Office renewal records 1978-2025
In the public domain since
1 January 1981 (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 1979 or 1980 volume; volumes searched: 1979, 1980, 1981.

The renewal sections are OCR text of printed volumes; a damaged record can hide a renewal. Before relying on this, search the linked volumes yourself for the title and for number MP3341.

Catalog entry

Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1953, Internet Archive catalogofcopyrig371213lib (OCR text), lines 10395–10405.

Summary: Simple experiments explain 
the theory of Newton's three laws of motion— 
the phenomena of momentum and inertia, the 
concept of acceleration, and the theory of 
reciprocal attraction of all bodies. Shows 
everyday applications of these laws. 
Credits: Associate producer, Milan Her- 
zog; collaborator, O. W. Eshbach. Koda- 
chrome. 
© Encyclopaedia Britannica Films, inc.; 
230ct52; MP3341. 

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