First published 1947. This Dover reprint is the 1970 edition. About 950 pages. Naturally has excursions into physics, including the structure of the nucleus and electrons, and things like electron shells. Also of course gas material from Avogadro onwards, and the relation with atomic and molecular weights, vapour pressures etc. And states of matter, such as ice, and water including deuterium and tritium; and crystallography. He doesn't clearly distinguish theories from empirically established material - but this is very common and part of the legacy of overblown mathematical treatments. Naturally enough, it has to deal with chromatography, and mass spectroscopy - i.e. separation by weight. This book predates most colour chemistry. Pauling made a mistake over 'high energy bonds'; he has quite a bit of material on biochemistry, perhaps foreshadowing Pauling's later vitamin C obsession, including hormones, vitamins, amino acids, and enzymes. There's some metallurgy. There's also an account of ektachrome colour photography - state of the art then. Much of the book is organised on periodic table lines, for example by metals with similar characteristics, and inert gases etc - and of course the full table had only recently been elucidated when Pauling wrote first, as not just transuranics but a few other gaps had been filled only in living memory. Other periodicities of course are discussed. And there's the maths of thermodynamics (includes in effect thermite - as in 9/11), heats and rates of reaction, and 3-D geometry and some other things. He gets supercooled things wrong, and I think the kinetic theory of gases.
If you like to know how things are made, and what from, and have a sense of historical continuity, this is a very good one volume reference. Pauling was not one to admit he was uncertain, so this book is more hard edged than it ought to be - I suspect in lectures and teaching Pauling would have been less dogmatic. The emphasis on overviews, and mathematical models, does however remove some of the picturesqueness of earlier chemistry texts, with accounts of mercury mines in Spain, or German minerals and Paracelsus, or wallpapers and 'poison green', so it's relatively austere. Highly recommended for people with science interests, and some maths, who like to ponder the slow processes of unravelling truths.