Hi John,
I notice that they also have a magnetic calculator:
http://www.kjmagnetics.com/calculator.asp
Roderick Wall.
-----Original Message-----
From: John Carmichael
Sent: Thursday, January 06, 2011 3:47 AM
To: 'Mike Shaw'
Cc: 'Sundial List'
Subject: RE: Glass on Glass Mosaic Indoor Sundial Windows
p.s.
Since these neodymium magnets are so strong, if they are too big, they may
break the glass before falling off! I'm guessing that the magnetic bonding
force is directly proportional to the area of the flat face of a disk
magnet. The bigger the magnet, the more its bonding force. You might want
to use a smaller size neodymium magnet with a gnomon for glass
-----Original Message-----
From: Mike Shaw [mailto:[email protected]]
Sent: Tuesday, January 04, 2011 4:29 PM
To: John Carmichael
Cc: Sundial List
Subject: Re: Glass on Glass Mosaic Indoor Sundial Windows
John
Nobody has mentioned double glazing yet.
I assume that you don't bother with that in Arizona.
Will the magnets still be OK to use through two thicknesses of glass with an
air space between?
Mike Shaw
53.37N 3.02W
www.wiz.to/sundials
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