What is a rubber policeman?

Subject: What is a rubber policeman?

Date: Wed Dec 29 04:10:09 1999
Posted by Michel Lau
Grade level: 10-12 School: No school entered.
City: No city entered. State/Province: No state entered. Country: No country entered.
Area of science: Chemistry
ID: 946462209.Ch

Message:


In a AP chemistry book, there is a list of laboratory equipment and on 
that list there is this thing called rubber policeman, i was wondering 
what exactly is it and what it is use for.

Thank you.

Re: What is a rubber policeman?

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