MICHIGAN ACADEMY OF SCIENCE. 
121 
Fig. 15. — Sealing end of opsonising pipette in flame. 
to all at one time. A piece of filter-paper cut to proper size and laid on the 
slides serves the double purpose of filtering the stain and of distributing 
it uniformly over the slides. 
Method of Staining Tubercle. — 1. Fix the slides in saturated solution of 
corrosive sublimate. Wash. 
16 
A small incubator of special design for opsonic work. 
