How many out in HistoLand soak your blocks in ice water with ammonium
hydroxide added?  What are the pros and cons(other that the odor!) of using
ammonium hydroxide?

Thanks  

Linda Ryan, BS, HT(ASCP)HTL
National Institute of Environmental Health Sciences
111  T. W. Alexander Dr.
Bldg./rm.: 101/C-262
P.O. Box 12233
Research Triangle Park, NC 27709
(919) 541-4880(Laboratory)