The man of true genius, who studies science in consequence of its applications, pointing out to himself a definite end, will make use of all the instruments of investigation which are necessary for his purposes: and in the search of discovery, he will rather pursue the plans of his own mind than be limited by the artificial divisions of language.

A Discourse, Introductory to a Course of Lectures on Chemistry (pp. 10-11), Press of the Royal Institution of Great Britain. London. 1802