138 LAWSON G. LOWREY 



14. The stomach and intestines increase gradually thr(jugh- 

 out the prenatal period, forming near full term about 6 per 

 cent with contents, or 3.6 per cent empty. In the adult, they 

 increase to 4.79 per cent empty or 6.8 per cent with contents. 



15. During prenatal life the total weight of the body and the 

 relative weight of the gonads are greater in the male, while the 

 relative weight of the liver is usually greater in the female. . 



LITERATURE CITED 



Donaldson, H. H. 1906 A comparison of the white rat with man in respect 

 to the growth of the entire body. Boas Memorial Volume, New York. 



1908 Comparison of the white rat with man in respect to the growth 

 of the brain and spinal cord. Jour. Comp. Neur. Psych., vol. 18, 

 no. 4. 



1909 On the relation of the body length to the body weight and to 

 the weight of the brain and of the spinal cord in th« albino rat. Jour. 

 Comp. Neur. Psych., vol. 19, no. 2. 



CoBURN, F. D. 1894 Swine husbandry. 



Davenport, C. B. 1908 Experimental morphology. 



Fehling, H. 1877 Beitrage zur Physiologie des placentaren Stoffverkehres. 



Archiv. f. Gynaekologie. Bd. 2. 

 Jackson, C. M. 1909 On the prenatal growth of the human body and the relative 



growth of the various organs and parts. Amer. Jour. Anat., vol. 



9, no. 1. 



Keibel, F. 1897 Normentafeln zur Entwickelungsgeschichte des Schweines. 



Kellicott, W. E. 1908 The growth of the brain and viscera in the smooth dog- 

 fish. Amer. Jour. Anat., vol. 8, no. 4. 



Long, J. 190G The book of the pig. 



MiNOT,C. S. 1907 The problem of age, growth and death. Pop. Science 

 Monthly, vol. 71. (Also published in book form. New York, 1908). 



MuEHLMANN, M. 1900 Uebcr die Ursache des Alters. Wiesbaden. (Quoted 

 by Jackson). 



Spenceh, S. 1S98 Pigs — Breeds and management. 



ViKROKDT, H. 1906 Anatomische, Physiologisc^he und Physikalische Daten 

 und Tabellcn. 3 Aufl. 



Waldeyer, W. 1906 In Hertwig's Handbuch dcr Eiitwicklungslehre der VVir- 

 beUiere. Bd. 1, Jena. 



VVelcker, H., AND Brandt, A. 1903 Gewichtswerte dcr Koorperorgane bei 

 dem Monschen und d'.'ii Ticren. Archiv f. Anthrop. Bd. 28. 



