144 The Ohio Journal of Science [Vol. XVIII, No. 4, 



sions drawn at best, can be but tentative, since but few animals 

 were studied. To come to definite conclusions further study 

 is necessary with more data. Only when several hundred 

 animals have been investigated, can the real value of this 

 method be determined. We would suggest that provisional 

 measures of "temperament " may be obtained from the standard 

 deviations of frequency polygons taken from several animals 

 which are studied at the same time under the same conditions 

 (preferably while feeding). Correlations between the "tem- 

 perament" or reactiveness of animals and their milk producing 

 abilities would, it seems to us, yield definite information as to 

 the value to be placed on the "temperament" or reactiveness of 

 dairy animals. 



BIBLIOGRAPHY. 



1. David Low — Domesticated Animals of the British Isles. MDCCLIII, p.-cvi. 



2. E. L. and J. N. Sturtevant— The Dairy Cow, 1875, p. 85-92. 



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1912 Vol. 43, p. 588. 



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Vol. 28, p. 776; p. 391; p. 690. 



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175. 



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Co., New York. 



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Scribner & Sons, New York. 



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Date of Publication, February 28, 1918. 



