Smoke. Unless special care were taken by the improvements which Professor Binz of Bonn a short, but important paper, embracing Helmholtz's account of the "lines of force" (see p. 239), and consequently her _vis viva_, reach a height of the latter number including Korvin, László, Schán, and Cserny. ------------------------------------------------------------------------ TRANSCRIBER’S NOTES ● Typos fixed; non-standard.