204 M. M. Mercaur 
still have had. This capsule may now be taken out of the warm 
chamber and its contents be cooled in water as before. 
A paraffin cylinder with rounded tip is not easy to cut. This 
difficulty can readily be avoided by using a Lerevre watch glass for 
reimbedding (Text Fig. I, C and D). The tip of the cylinder, con- 
taining all the objects, is cut off and is placed in the center of the 
groove of an unwarmed LEFEVRE watch-glass, which has previously 
been lightly smeared with glycerine. With a hot pipette, melted 
paraffin in added on each side of the cool paraffin block, care being 
taken to leave this block with its contained objects still in the 
center of the groove. The watch-glass is now placed in the warm 
chamber until all is melted. It is then removed, without jarring, 
and placed in water, or alcohol (LEFEVRE), to cool. The resulting 
block of paraffin is of a shape convenient for sectioning (Text Fig. I, B). 
€ D 
Text Fig. I. Illustrating the method of imbedding small objects. A, a box con- 
taining three gelatine capsules; B, the block of paraffin taken from a LEFEVRE 
watch-glass; C and D, sections of a Lerevre watch glass. (B, C and D from 
Mayer after Lerevre.) 
Since the objects to be sectioned are all in the center of the pro- 
jecting ridge, the ends of the ridge may be cut away and a com- 
pact series of sections be obtained. This method is not tedious. 
It requires no watching. *) 
1) I am greatly indebted to Professor Paut Mayer for suggesting the use 
of gelatine capsules in imbedding. His further suggestion that they might well 
