CHAPTER III.
INSTRUCTION.
[Illustration] We come now to consider the subject of Instruction.
There are three kinds of human knowledge which stand strikingly distinct from all the rest.

They lie at the foundation.

They constitute the roots of the tree.

In other words, they are the _means_ by which all other knowledge is attained.

I need not say that I mean Reading, Writing, and Calculation.
Teachers do not perhaps always consider how entirely and essentially distinct these three branches of learning are from all the rest.