Light Guy
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Joined: Thu Mar 04, 2010 8:26 am
Occupation: Student: 8th Grade

John Joly Photometer

Postby Light Guy » Wed Mar 17, 2010 10:33 am


Do you know when John Joly invented the photometer? I've been trying to find it but can't.


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Re: John Joly Photometer

Postby Amber_MIT » Wed Mar 17, 2010 3:20 pm

I've tried looking for a while too, and all the articles I've found only list the dates for his awards and a few other discoveries. Do you absolutely need the date in your paper? You could mention when he was born and died to give a range, or you could give a date for some of his awards.

I would also try looking up "photometer" in a real encyclopedia.
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