Re: Sorvall 45700 Glass Knife Maker


just another little aside about glass knives in general.
in my experience ralph type knives were very good for cutting larger pieces of
soft tissues embedded in gma, but i found them to be too fragile to cut
mineralized bone embedded in gma and thought the triangle knife edges were a
little less fragile, but ultimately for bone i had to abandon glass knives all
together and go to tungsten carbide because the fragile glass knife edges just
did not hold up for cutting bone, too many scratches.
my 2 cents worth.

"Monson, Frederick C." wrote:

> No! No!  Patsy.  Ralph knives were originally made by Ralph without a Ralph
> knife maker!  Even worse, Ralph didn't even make the Ralph Knife Maker (It
> would have been called "Ralph's Knife Maker"), no money for the use of his
> name either.  Ralph made his knives by scoring a 6mm thick long strip of
> ultramicrotomy glass, then he rested the glass strip on a wooden stirring
> stick so that the score lay slightly to the left or right, but parallel to
> the stick.  Then he pressed with a Ralph amount of force to get the strip to
> break (he wasn't wearing his glasses, and his mother said he would put his
> eyes out!).  The result was a short strip with a cutting edge that extended
> the full width of the strip.  Ralph mounted the glass knife on a length of
> steel with some adhesive, I used hot glue, and cut 2um sections on his
> rotary microtome from GMA blocks.
> Ralph's real claim to fame is that no one remembers whether "Ralph" is the
> first or last name, but he is better known than Student who is more famous
> than the totally anonymous fabricator (also a student!) of FITC from F.
> If I read this, I won't be able to send it.
> Fred
> Frederick C. Monson, PhD
> Center for Advanced Scientific Imaging
> Schmucker II Science Center
> West Chester University
> South Church Street
> West Chester, Pennsylvania, USA, 19383
> Phone:  610-738-0437
> FAX:  610-738-0437
> CASI URL:  http://darwin/
> Visitors URL:
> > ----------
> > From:         rueggp
> > Sent:         Thursday, April 11, 2002 11:23 AM
> > To:   Margaret Gondo
> > Cc:   HistoNet Server
> > Subject:      Re: Sorvall 45700 Glass Knife Maker
> >
> > NO
> > The Sorvall knife maker makes the cut on the thickness of the glass, you
> > would need a Ralph Knife maker to cut Ralph Knives.
> > Patsy
> >
> > Margaret Gondo wrote:
> >
> > > Hi All -
> > >
> > > I have unearthed a Sorvall 45700 Glass Knife Maker.  I can't seem to
> > > locate any other information on this.  I'm just curious if anyone out in
> > > Histoland knows if the instrument will make a Ralph Knife.
> > >
> > > Thanks in advance,
> > > Margaret
> >
> >
> >

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