Donaldson, Brain and Spinal Cord of Rat. 167 



spinal cord is suhjeet to a coiTCspoiidiiig ainoimt of passive lengtli- 



eniiio'. 



'5- 



8. The body leiigtli is a l)etter datum than the body weight from 



which to infer the weight of the Itrain or of the spinal cord. This 

 is especially true when there is any reason to suspect emaciation 

 of the body. 



9. A mean of the two determinations of the weight of the brain 

 or of the spinal cord (1) from the body weight (when normal) 

 and (2) the body length, will give better a]i]>roximations than the 

 determination based on either datum alone. 



BIBLIOGRAPHY. 

 Blakeman, J. 



190.5. A study of tlie biometric constants of English brain-weights, and 

 their relationships to external physical measureaients. Bio- 

 metrika, vol. 4, pp. 124-100. 

 Donaldson. H. H. 



1000. A comparison of the white rat with man in respect to the growth 

 of the entire body. Boofi McmorUil VoJkiiic, pp. .5-0. 



1908. A comparison of the albino rat with man in respect to the growth 



of the brain and of the spinal cord. Joiini. Coiiip. NciiroL, 



vol. IS, no. 4, pp. 345-.302. 

 Hatai, S. 



1907. Studies on the variation and correlation of skull measurements in 



both sexes of mature albino rats (Mus norvegicus var. 



albus). Alitor. Joiirn. Anat., vol. 7, no. 4, pp. 423-441. 

 190S. Preliminary note on the size and condition of the central nervous 



system in albino rats experimentally stunted. Jourii. Coiiip. 



NcuioL. vol. IS. no. 2, pp. 151-155. 



1909. Note on the fornuilas used for calculating the weight of the brain 



in the alI)ino rats. Joitrii. Coiiip- ^^ciiioL, vol. 19, no. 2. 

 Mies, J. 



1S93. Ueber das Gewicht des Ruckenmarkes. Centrum, f. Ncrvenheil- 

 Jitindc ti. Psychiatric, S. 1-4. 



PriSTER, H., 



1903. Zur Anthropologie des Riickenmarks. Neurol. Central!)., Bd. 22, 

 S. 757 und 819. 

 West, G. M. 



1892. Anthropometrische Untersuchungen iiber die Schulkinder in Wor- 

 cester, Mass., Amerika. Archiv f. Anthropologic, vol. 22, 

 pp. 13-48. 



