Matter, pores and spaces in, [22]
Matter, relation of heat to spaces of, [23]
Matter, inertia of, [48]
Matter, impenetrability of, [45]
Matter equally inclined to rest and motion, [50]
Mechanical powers, real advantages of, [246]
Mercury, freezing of, [318]
Microscopes, [350]
Microscopical animals, [19]
Mirages, [347]