RECENT PROGRESS IN CHEMISTRY.

By Prof. H. C. Boltom.—Chemical societies, new elements, atomic weights, spectrum analysis, form of matter, affinity and chemical action, electrolytic thermal chemistry, new views of chemical reaction, chemical dynamics, chemical physics, liquefaction of gases, chemical industries, nomenclature, progress in organic chemistry, the aromatic series of compounds, synthesis of organic compounds, physiological and sanitary chemistry, tendency of modern chemistry. Contained in Scientific American Supplement, No. 546. Price 10 cents. To be had at this office and from all newsdealers.