John Joseph Griffin

"Reader! Imagine a school-boy who has outgrown his clothes. Imagine the repairs made on the vestments where the enlarged frame had burst the narrow limits of its inclosure. Imagine the additions made where the projecting limbs had fairly and far emerged beyond the confines of the garment. Imagine the boy still growing, and the clothes, mended all over, now more than ever in want of mending — such is chemistry, and such its nomenclature."

"I have been induced to adopt this course by a desire that my readers should be taught to think as well as to experiment, and thus be qualified at an early part of their study to discriminate between the true and the false, and acquire the facts of the science without being mystified by its fictions."