''Principles of Physics'' by Alfred P. Gage. Illus in b/w; one color illustration. Copyright 1895. Interior cover addressed "Hilma Peterson, 2001 Normal Street, Cedar Falls, Iowa". 638 pp. Text used at ISNS. Contains many changes in the technical nomenclature of physics and many improvements in methods of presentation of portions of the science made in the topics of electricity and magnetism. Color: BR