2/19/98

I look at cells in a tissue culture dish on an inverted microscope stage

and would like to mark their location in the dish so I can return to that

same position at a later time. I have heard of a special 'lens' that acts

as a scribe that, while rotating the turret to swing it in place, it

scratches the underside of the dish with a special hard tip. It has no

ocular capabilities, so you cannot see as you are scratching. Does anyone

know where these would be available?

Barring this cumbersome solution, has anyone solved this problem in some

other way (i.e. less expensive, simpler).



judy



Judy Trogadis

Eye Research Institute and

University of Toronto

Toronto Hospital, Western Div.

399 Bathurst St.

Toronto, Canada M5T 2S8



phone: 416-603-5088

Fax: 416-603-5126

email: judy@playfair.utoronto.ca

McCrone Accessories & Components, 800-622-8122, has a device that

marks a ring with ink on the glass. It is not clear from the catalog

whether you can see through it. It mounts with RMS threads.

Leonard Corwin

Fort Dodge Animal Health (Analytical Research)

Princeton, NJ 08543-0400 corwinl@pt.cyanamid.com

When I used to work at Cambridge Instruments (now Leica), they sold a

marking objective which you could rotate into position. It just had a

simple ink stamp on it. I only had my hands on it once but as I remember,

it had a collar on it and you just moved the marking ring toward the

slide/dish and gently pressed to leave an impression. I'd suggest you try

your local Leica rep or dealer.



Barbara Foster

Consortium President

Microscopy/Microscopy Education

125 Paridon Street - Suite B

Springfield, MA 01118 USA

PH: (413)746-6931 FX: (413)746-9311 email: mme@map.com

I didn't respond to this on the first go-round, because I didn't think that

it was what the orinal poster (Judy) wanted, but we (Energy Beam Sciences)

have made a device like this, called the Slide Marker, for over 20 years.



Best regards,

Steven E. Slap, Vice-President

Energy Beam Sciences, Inc.

Adding Brilliance To Your Vision

ebs@ebsciences.com

http://www.ebsciences.com/

Judy

Ernest F. Fullam, Inc sells a device similar to the one you describe. The

the toll free phone # is 800-833-4024 or you can try 518-785-5533. Fax# is

518-785-8647. The item is called an EFFA microdotter, and the catalog

('92--'93) # is 13400. Good luck1





Tom

jtd1@psu.edu (Tom Doman)

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