This textbook presents scientific knowledge in a question-and-answer format. It is intended for the use of families and schools, explains about 2000 questions that children commonly ask, and is written in language so plain as to be understood by all. Heat, non-metallic elements, metals, organic chemistry, meteorology, optics, and sound are covered.

Discusses the development of physical organic chemistry: (1) before 1920; (2) from 1920 to 1930; (3) from 1930 to 1940; and (4) after 1940. Major accomplishments in these periods are noted. (JN)

Summarizes the ideas of Sir Robert Robinson and Sir C. K. Ingold that contributed to the controversy in developing the electronic theory of organic reactions. (CS)

This chemistry textbook presents a beginning course for schools or colleges. It presents a more complete classification than usual according to chemical analogies, the explanation of chemical phenomena in ordinary language, as well as symbols, and the addition of a complete set of formulae in the appendix. A number of recent and important…

This chemistry textbook presents a beginning course for schools or colleges. It presents a more complete classification than usual according to chemical analogies, the explanation of chemical phenomena in ordinary language, as well as symbols, and the addition of a complete set of formulae in the appendix. A number of recent and important…

This chemistry textbook presents a beginning course for schools or colleges. It presents a more complete classification than usual according to chemical analogies, the explanation of chemical phenomena in ordinary language, as well as symbols, and the addition of a complete set of formulae in the appendix. A number of recent and important…

This chemistry textbook presents a beginning course for schools or colleges. It presents a more complete classification than usual according to chemical analogies, the explanation of chemical phenomena in ordinary language, as well as symbolic language. A series of new and original designs are introduced, illustrating to the eye the groupings of…

Provided is a biographical sketch of Percy L. Julian (1898- ), an American Black organic chemist who first synthesized cortisone, testosterone, progesterone, and physostigmine. (CS)