REFERENCES TO THE LITERATURE 239 



KING, HELEN D. 1911 b The sex ratio in hybrid rats. Biol. Bull., vol. 21, 

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1913 Some anomalies in the gestation of the albino rat (Mus nor- 

 vegicus albinus). Biol. Bull., vol. 24, pp. 377-391. 

 1913 a The effects of formaldehyde on the brain of the albino rat. J. 

 Comp. Neur., vol. 23, pp. 283-314. 



1915 On the weight of the albino rat at birth and the factors that in- 

 fluence it. Anatomical Record, vol. 9, pp. 213-231. 



KING, HELEN D. AND STOTSENBURG, J. M. 1915 On the normal sex ratio and 

 the size of the litter in the albino rat (Mus norvegicus albinus). Ana- 

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KING, JESSIE L. 1910 The cortico-spinal tract of the rat. Anat. Rec., vol. 4, 

 pp. 245-252. 



KIKKHAM, WILLIAM B. 1910 Ovulation in mammals, with special reference to 

 the mouse and rat. Biol. Bull., vol. 18, pp. 245-251. 



KIRKHAM, WILLIAM B. AND BURR, H. S. 1913 The breeding habits, maturation 

 of eggs and ovulation of the albino rat. Am. J. Anat., vol. 15, pp. 291- 

 317. Six excellent plates illustrating the egg in various phases. 



KLEBS, E. 1891 Zur vergleichenden Anatomic der Placenta. Archiv. f. mikr. 

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KLEIN, EDWARD UNO VERSON, E. 1871 Der Darmkanal. In Strieker's Hand- 

 buch der Lehre von den Geweben des Menschen und der Tiere. See 

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KLEIN, E. 1875 The anatomy of the lymphatic system. II. The lung. Smith, 

 Elder & Co., London, 88 pages, 6 plates. Observations mainly on 

 guinea pig. Rat among other animals used. 



KLUNZINGER, C. B. 1908 Ueber unsere Ratten und Mause, deren Schaden und 

 Bekampfung. Jahresh. Ver. vaterl. Naturk. Wurttemberg Jahrg., 

 64 p. xxxi-xxxviii. 



KNAPP, PAUL 1908 Experimenteller Beitrag zur Ernahrung von Ratten mit 

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 storungen mit Erkrankungen der Conjunctiva. Zeit. exp. Path. u. 

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KOCH, MATHILDE L. 1913 Contributions to the chemical differentiation of the 

 central nervous system. I. A comparison of the brain of the albino 

 rat at birth with that of the fetal pig. J. Biol. Chem., vol. 14, pp. 

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KOCH, W. AND MANN, S. A. 1909 A chemical study of the brain in healthy and 

 diseased conditions, with especial reference to dementia praecox. 

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KOCH, WALDEMAR AND KOCH, MATHILDE L. 1913 Contributions to the chemical 

 differentiation of the central nervous system. II. A comparison of 

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1913 a Contributions to the chemical differentiation of the central 

 nervous system. III. The chemical differentiation of the brain of 

 the albino rat during growth. J. Biol. Chem., vol. 15, pp. 423-448. 



