Dr. Bell is proficient in many fields of science, and has the art of making every subject he touches interesting, even the most abstruse theories.
The subject is too abstruse to enlarge further upon here.
He had the imagination that invested with personal being and ethical qualities the most abstruse notions.
In expounding the principles of the differential calculus, he started, as it were, from the level of his pupils, and ascended with them by almost insensible gradations from elementary to abstruse conceptions.
His clearness of statement and power of imparting interest to the most abstruse topics were the conspicuous features of his teaching, and in his various capacities as a scientific lecturer, a physiologist, and a practical physician, he was ever surrounded with large and increasing classes of intelligent pupils, to whom his eminently suggestive mode of instruction was specially attractive.