This applies not only to our industrial States. but to our agricultural States as well. What accounts for this great difference? Certainly one of the key factors is the persistence with which immigrants have brought to us new techniques. new refinements in production. marketing. invention. and transportation. One has only to call the roll of inventions which have contributed so much to the greatness of our country to realize the truth of this observation. Look at the field of industrial invention alone. There Is the German immigrant Steinmetz and the Yugoslav immigrant Pupin. fathers of great discoveries in electricity. the immigrant Swede. Ericsson. who brought us the ironclad ship and screw propeller. the ScottishAmerican Alexander Graham Bell. of telephone fame. is too well known to require mention. and the immigrant German. Mergenthaler. who invented the linotype. Think how much he has contributed to the enlightenment of our people by making possible the great newspapers and press of our country. Think of the great advances in aviation in this country which have resulted from the work of the Italian immigrant. Bellanca. and the Russians. Sikorsky and De Seversky.
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