>The question is, should we use "reservoir tips" or lubricated?  =:)
 
Occasionally I just cut a small hole in the end of the reservoir, and
roll the opening around a small o-ring, and use the tip for free acid
calibrations. Or you can use this under a cover glass, but usually a
drop of water on the lens will just stay put as immersion oil does.
 
As for lubricated vs. non-lubricated. The lenses get awfully slippery
when you use the lubricated ones, lubrication immersion lenses can be
hard to catch! :)
 
Some people say I've got a thing for condoms and o-rings! I can't guess why!
 
                                        __    /
   Stephen H. Cody,                   _/  \__/ \
   Department of Physiology,         /          \
   University of Melbourne,         /  Australia \
   Parkville, Victoria 3052,        \   ____     /
   Australia.                        \_/    \_*_/
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