ON MOUNTING DELICATE BRYOPHYTES IN GLYCEROL

Glycerine jelly is an effective substitute microscopic mounting medium for now difficult-to-obtain gum chloral preparations. It does not col lapse most thin bryophyte tissues, preserves color responses of cell w alls to potassium hydroxide solution, and is made from easily obtained , non-poisonous ingredients. Like other glycerol-based mountants, it e vaporates only very slowly and with luting, is essentially permanent.