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

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

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Permanent Link: http://hdl.handle.net/1805/1764
Date: 1903-08
Keywords: Erasers ; Indiana ; Chalk ; Dust ; Inventions ; Jones, J.A.(Plymouth) ; Schools ; Simple Machines
Cite As: Indiana State Board of Health. Monthly Bulletin. 1903; 5(8) :90.
ISSN: 0019-6754
Found At: Indiana State Board of Health

Abstract:

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

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