RE: grids for cell counting

From:"Tarpley, John" <>

> ----------
> Sent: 	Wednesday, September 27, 2000 1:41 AM
> To: 	kwalters
> Cc:
> Subject: 	Re: grids for cell counting
> Kathy,
> There are two possibilities open to you (sorry, three but I assume 
> superimposing a grid thru you software is one you have thought of).
--snip snip--
Good advice Russ. Another option if the software won't impose a grid on the
video screen is simply to make a transparency copy of a page of graft paper
which has a grid pattern that suits the work. The transparency is then taped
to the monitor and calibrated with a stage micrometer as described for using
an optical reticule. Some people find using a grid of some type on the
monitor produces less eyestrain and more accurate counts.

John Tarpley  5-1-A
Associate Scientist,
Amgen Inc
One Amgen Center Drive
Newbury Park, CA 91320

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