Baskets of dusty and clean chalboard erasers demonstrate the Chalkdust cleaner invention.

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Date
1903-08
Language
American English
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Indiana State Board of Health
Abstract

[Chalkboard erasers before and after, using Chalk dust cleaner]

Description
Keywords
Erasers, Indiana, Chalk, Dust, Inventions, Jones, J.A.(Plymouth), Schools, Simple Machines
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Cite As
Indiana State Board of Health. Monthly Bulletin. 1903; 5(8) :90.
ISSN
0019-6754
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Page 90, lower left approximately 5 X 2 in.
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Monthly Bulletin
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still image b&w photograph
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https://hdl.handle.net/1805/1764
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Indiana Public Health Images Collection