Frank-Kamenetskii, a leader in Russian science, was the first to define conditions for two stable operating regimes in chemical reactions, one controlled by chemical reactions, the other by diffusion processes. In this book he treats mathematically the subjects of reaction ignition, quenching, and periodic processes in chemical kinetics as found in flames, combustion of solids, and other chemical reactions. The book was translated from the Russian by the late N. Thou and edited by R. Wilhelm. Originally published in 1955. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.