Subject: who invented the mechanical pencil
Date: Wed Dec 9 08:37:28 1998
Posted by zach gillespie
Grade level: 7-9
School: Otsego middle school
City: grand rapids State/Province: oh
Area of science: Science History
who invented the mechanical pencil and what year was it invented?
where was it first manufactured?
how was it constructed?
Re: who invented the mechanical pencil
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