ialen Medizin und der sozialen Hygiene. Berlin, 1912.

(3) Lilienfeld, Paul de. _La Pathologie sociale._ Avec une preface de
Rene Worms. Paris, 1896.

(4) Thompson, Warren S. _Population._ A study in Malthusianism. New
York, 1915.

(5) Field, James A. "The Early Propagandist Movement in English
Population Theory," _American Economic Association Bulletin_, 4th Ser.,
I (1911), 207-36.

(6) Heron, David. _On the Relation of Fertility in Man to Social
Status._ And on the changes in this relation that have taken place
during the last fifty years. London, 1906.

(7) Elderton, Ethel M. "Report on the English Birthrate." University of
London, Francis Galton Laboratory for National Eugenics. _Eugenics
Laboratory Memoirs_, XIX-XX. London, 1914.

(8) D'Ambrosio, Manlio A. _Passivita Economica._ Primi principi di una
teoria sociologica della popolazione economicamente passiva. Napoli,
1909.

(9) Ellwood, Charles A. _Sociology and Modern Social Problems._ Rev. ed.
New York, 1913.

B. _Poverty, Labor, and the Proletariat_

(1) Woods, Robert A., Elsing, W. T., and others. _The Poor in Great
Cities._ Their problems and what is being done to solve them. New York,
1895.

(2) Rowntree, B. Seebohm. _Poverty, a Study of Town Life._ London, 1901.

(3) Devine, Edward T. _Misery and Its Causes._ New York, 1909.

(4) Marx, Karl. _Capital._ A critical analysis of capitalist production.
Chap. xv, "Machinery and Modern Industry." Translated from the third
German edition by Samuel Moore and Edward Aveling, and edited by
Frederick Engels. London, 1908.

(5) Hobson, John A. _Problems of Poverty._ An inquiry into the
industrial condition of the poor. London, 1891.

(6) Kydd, Samuel [Alfred, pseud.] _The History of the Factory Movement._
From the year 1802 to the enactment of the ten hours' bill in 1847. 2
vols. London, 1857.

(7) Rowntree, B. S., and Lasker, Bruno. _Unemployment, a Social Study._
London, 1911.

(8) Beveridge, William Henry. _Unemployment._ A problem of industry. 3d
ed. London, 1912.

(9) Parmelee, Maurice. _Poverty and Social Progress._ New York, 1916.

(10) Gillin, John L. _Poverty and Dependency._ Their relief and
prevention. New York, 1921.

(11) Sombart, Werner. _Das Proletariat; Bilder und Studien._ Frankfurt
am Main, 1906.

(12) Riis, Jacob A. _How the Other Half Lives._ Studies among the
tenements of New York. New York, 1890.

(13) Nevinson, Margaret W. _Workhouse Characters and Other Sketches of