STUDY OF EFFECTS OF PRACTICE

A study which shows the effects of practice on employees. Includes scenes of two experienced operators assembling a mechanical pencil. Shows a new operator working on 12 different days while learning to fill a pin board with wooden pins. Credits: Director, Ralph M. Barnes; study made by L. F. Youde

Registration MP1561 No renewal found

Term began: 1951-08-01
Claimant: Ralph Mosser Barnes
Class: MP — published motion picture other than a photoplay (numbering series begun Jan. 1950)
Finding: no renewal entry found for 1978-1980 or in the Copyright Office renewal records 1978-2025
In the public domain since: 1 January 1980 (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 1978 or 1979 volume; volumes searched: 1978, 1979, 1980.

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 MP1561.

Catalog entry

Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1951, Internet Archive catalogofcopyri351213libr (OCR text), lines 45637–45647.

Summary: A study which shows the effects 


of practice on employees. Includes scenes 
of two experienced operators assembling 
a mechanical pencil. Shows a new operator 
working on 12 different days while learning 
to fill a pin board with wooden pins. 
Credits: Director, Ralph M. Barnes; 
study made by L. F. Youde. 
© Ralph Mosser Barnes; 1Aug51; MP1561.

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