CHAPTER XXXV.
ATOMIC WEIGHT.
Definition.—Atomic weight of oxygen.—Molecular symbols.—
Molecular and atomic volumes CHAPTER XXXVI.
DIFFUSION AND CONDENSATION OF GASES.
Diffusion of gases.—Law of diffusion.—Cause.—Liquefaction and solidification of gases
CHAPTER XXXVIL
SULPHUR.
Separation.—Crystals from fusion.—Allotropy.—Solution.—
Theory of Allotropy.—Occurrence and purification.—Uses.—-
Sulphur dioxide