7 
unnamed material is placed on the lecture table and 
sorted out by the professor and students, the charac- 
ters utilized jn indicated step o step during this 
exercise. 
Here, if anywhere, object teaching is essential, — 
each of these a is taught as a series of objec 
lessons. Gross characters are made out by the aid St 
the naked eye and ‘simple magnifying pe ee but for 
others the compound microscope is brougbt into req- 
uisition and some of the pharmaceutic schools have as 
a part of egular 
be compared w Primarily he is called on to 
ognize this ‘dontity or difference in comparison ag 
the plant that the material is supposed to represent. 
it be different the question as to what it really is is 
oe a secondary one, and as his knowledge increases 
e becomes more and more able to answer these 
accessory questions. 
good description is more available for use than a 
the time is ing wh 
equipped with manuals employing the characters 
