460 TOKUYASU KUDO 



There is in general a marked increase in the weight of the skele- 

 ton and a slight increase in the visceral group. 



The musculature remains nearly constant in weight. There 

 is a slight decrease in the integument and a marked loss in the 

 'reminder.' Of the individual viscera: 



1. The hypophysis, eyeballs, kidneys, suprarenals, spinal cord, 

 skeleton, sciatic nerves, pancreas, stomach-intestines, liver, and 

 uterus show a definite increase in weight. 



2. The heart, brain, and lungs remain nearly constant in 

 weight. 



3. The thymus, ovaries, parotid and submaxillary glands, 

 spleen, testes, epididymides, and thyroid suffer more or less well- 

 marked decrease in weight. 



The growth tendencies of the various organs in the young rats 

 during the thirst experiments correspond in general to those 

 found in rats of similar age during underfeeding, although certain 

 exceptions occur (testes and kidneys) . 



Likewise the results of the thirst tests (also those of the inani- 

 tion experiments) show a general resemblance to those of similar 

 character in adults. There are certain differences according to 

 age, however, as well as according to the type of inanition 

 employed. 



LITERATURE CITED 



Aeon, Hans 1911 Nutrition and growth. Philippine Jour. Science, vol. 6. 

 Donaldson, H. H. 1911 The effect of underfeeding on the percentage of water, 



on the ether-alcohol extract, and on the medullation in the central 



nervous system of the albino rat. Jour. Comp. Neur., vol. 21, no. 2. 



1915 The rat. Reference tables and data. Memoirs of The Wistar 



Institute of Anatomy, no. 6. Phila. 

 Donaldson, H. H., and Conrow, Sara B. 1919 Quantitative studies on the 



growth of the skeleton of the albino rat. Am. Jour. Anat., vol. 26, 



pp. 237-314. 

 Hatai, S. 1904 The effect of partial starvation on the brain of the white rat. 



Am. Jour. Physiol., vol. 12, no. 1. 



1913 On the weights of the abdominal and the thoracic viscera, the 

 sex glands, ductless glands and the eyeballs of the albino rat (Mus 

 norvegicus albinus) according to body-weight. Am. Jour. Anat., vol. 

 15, no. 1. 



1914 On the weight of the thyums gland of the albino rat (Mus nor- 

 vegicus albinus) according to age. Am. Jour. Anat., vol. IG, no. 2. 



