A CORRECTION In footnote 12, page 1268, in the July-August number of THISJOURNAL, under the article, "The History and Present Status of the Jaber Problem," by Julius Rnska, the author of the reference was erroneously listed as Ernest Darmstaedter. The name should have been Emst. The date following the name should have read 1877-, as Dr. Ernst Darmstaedter is still living, his uncle Ludwig having died in.1928, the year mentioned in the note.