Start Over Main contributor See Other Contributors Unit IUL Moving Image Archive

281. How big is an atom? (29:30)

Alternative title:
How big are atoms?; Atom
Date:
1958
Main contributors:
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Summary:
Establishes the realness of atoms by showing that they have a definite and understandable size in relation to the visible world. Reviews various determinations of the size of atoms. Discusses some ...

282. Stuff for Stuff (10:38)

Date:
1952
Main contributors:
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Summary:
Animation and regular photography tell the history of trade from prehistoric times through the Industrial Revolution, the tariff barriers, and the two world wars, to the present day. Describes the ...