Page:Popular Science Monthly Volume 66.djvu/28

24 the Dutch astronomer Kapteyn, of Groningen, celebrated for his measurements of stellar distances, discoursed on astronomy. Our own Campbell, of the Lick Observatory, delivered an admirable address on astrophysics, along with Turner, of Oxford. The section of paleontology, with Scott, of Princeton, in the chair, and John M. Clarke, New York the tetrahedral carbon atom in explanation of the behavior of substances chemically identical which nevertheless react differently to polarized light, thus creating the science of stereo chemistry.

Besides Backlund, of Russia,