...and traced their relations, by strict and exact observation; and the proper office of the text-book is but to confirm and embody the result, and classify...labelled and shelved in a collector's cabinet. The use of scicntific method, in the statements of text-books, is but to give logical arrangement to mental acquisitions,...

...to actual measurement and comparison, or has an exact image of its form and configuration before h's mind, that he has actually counted or grouped objects...repetition or verbal enunciation of propositions. perception prescribed in every exercise which he attempts ; that th« operation is intelligently performed...