Phebe Earle Gibbons, "Pennsylvania Dutch," and other essays
“ Nine years after the date of this map, by the census of 1860, the population of Scranton is given at nine thousand, and in 1870 at thirty-five thousand. This very rapid increase was caused by the working of the immense coal-beds which underlie the narrow valley of the Lackawanna, in which the city is situated.Forty-five per cent. of the population is given as foreign, or fifteen thousand eight hundred and eighty-seven. The miners are almost all of foreign birth, the Irish being the most numerous, next the Welsh, then the Germans, and lastly the English and Scotch. ”
