=10. The Germans.=—The Germans—Protestant, Catholic, and Jew—push frontiers westward, fashion the Kentucky rifle, build “Switzer” barn and Conestoga wagon, and develop agriculture, forestry, music, art, education, and science. DUBOIS, R. and SCHWEPPE, E. (eds). _Germans in American Life._ Thomas Nelson and Sons, New York. 1936. FAUST, A. B. _German Element in the United States._ (2 vols.) Houghton, Mifflin Co., Boston, Mass. 1927. HARK, ANN. _Hex Marks the Spot._ J. B. Lippincott Co., Philadelphia, Pa. 1938. =11. The Scandinavians.=—Swedes, Norwegians, and Finns settle North-Central States, introducing log cabins, co-operatives, progressive dairy methods, social consciousness, gymnastics, and folk high schools. BENSON, ADOLPH B. and HEDIN, NABOTH (eds). _The Swedes in America._ Yale University Press, New Haven, Conn. 1938. HAVIGHURST, WALTER. _Upper Mississippi: A Wilderness Saga._ Farrar and Rinehart, N. Y. 1937. RÖLVAAG, O. E. _Giants in the Earth._ McClelland and Stewart, Toronto, Canada. 1937. =12. Closing Frontiers.=—When there is no more good free land to settle, immigrants crowd into our cities to supply demand for unskilled labor. HOUGH, EMERSON. _The Passing of the Frontier._ Yale University Press, New Haven, Conn. 1918. PAXSON, F. J. _History of the American Frontier._ Houghton, Mifflin Co., Boston, Mass. 1924. =13. The Jews.=—Participating in American life since early colonial days, the Jews make significant contributions to science, industry, music, literature, theatre, law, medicine, and philanthropy. BROWNE, LEWIS. _Stranger Than Fiction._ Macmillan Company, N. Y. 1933. DUBOIS, R. and SCHWEPPE E. (eds). _Jews in American Life._ Thomas Nelson and Sons, N. Y. 1935. WALD, LILLIAN D. _The House on Henry Street._ Henry Holt and Co., N. Y. 1915. =14-15. The Slavs.=—The Slavs—northern and southern—succeed in making abandoned farms productive and work in our mines, steel mills, automobile factories, packing houses, and forests. ADAMIC, LOUIS. _Laughing in the Jungle._ Harper and Brothers, N. Y. 1932. BALCH, EMILY G. _Our Slavic Fellow Citizens._ Charities Publication Committee, N. Y. 1910. MILLER, K. D. _Peasant Pioneers._ Council of Women for Home Missions, N. Y. 1925. =16. The Orientals.=—Chinese and Japanese bring artistic sensitivity of Far East. Chinese answer call of railroad, ranch, and factory. Japanese reclaim California swamps and develop farms. HUNTER, ALLAN A. _Out of the Far East._ Friendship Press, N. Y. 1934. PALMER, ALBERT W. _Orientals in American Life._ Friendship Press, N. Y. 1934. SUGIMOTO, ETSU. _A Daughter of the Samurai._ Doubleday, Page Co., N. Y. 1927. =17. The Italians.=—Early explorers and artisans come from Italy, help to build grape and wine industry, work in our marble quarries, raise vegetables, and help to build railroads, bridges, and highways.