A system of natural philosophy : in which are explained the principles of mechanics, hydrostatics, hydraulics, pneumatics, acoustics, optics, astronomy, electricity, magnetism, steam-engine, electro-magnetism, electrotype, photography, and daguerreotype : to which are added questions for the examination of pupils, designed for the use of schools and academies : illustrated by three hundred engravings / by J.L. Comstock, M.D., author of Introduction to mineralogy, Elements of chemistry, Introduction to botany, Outlines of geology, Outlines of physiology, Natural history of birds, etc.