In order to avoid becoming entangled in abstractions, we may choose a specific instance to show the difficulties in the way of securing the correct kind of preparation, even though the quantity is guaranteed. The Zoology Department (I choose this department neither because it is worse nor better than any other, but because I am better acquainted with the content of its courses) makes the following requirements for the Teacher's Recommendation:
General Zoology
Invertebrate Zoology—
an advanced course which omits all consideration of insects, and all discussion of parasitic forms.
Vertebrate Zoology—
mainly a course in comparative morphology, which gives no field knowledge of California vertebrates, the most essential thing for the high school teacher.
and one subject from each of the following groups,
Group I
Comparative Anatomy.
Cytology—
basic principles must be understood by the teacher but he should not have to spend one whole half year to acquire them.
Embryology.—