Steve, welcome to research!  It is a different world here.  My advice
would be to buy a hydrometer, and test your alcohols.  When your last
100% starts to show some water, rotate it up to the position just past
the 95% alcohol and make the later changes fresh.  Also invest in the
animal processing manual from the NSH.  You'll find some very helpful
schedules in there for all kinds of animal tissues.
 

Teri Johnson
Managing Director Histology Facility
Stowers Institute for Medical Research
1000 E. 50th St.
Kansas City, Missouri  64110
tjj@stowers-institute.org


 
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