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(7) Hammarsten, O. 1915. A text-book of physiological chemistry. Trans- 
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(8) Hart, E. B., McCollum, E. V., and Humphrey, G. C. 1909. The role of 
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(9) Henry, W. A., and Morrison, F. B. 1915. Feeds and feeding. 15th ed. 
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(10) Same. p. 668. 
(11) Same. p. 113. 
(12) Meigs, E. B., Blatheravick, N. R, and Cary, C. A. 1919. Contributions 
to the physiology of phosphorus and calcium metabolism as related 
to milk secretion. In Jour. Biol. Chem., v. 37, no. 1, p. 1-75. 
(13) Meigs, E. B. Blatherwick, N. Ii., and Cary, C. A., with the collaboration 
of Woodward, T. E. 1919. Further contributions to the physiology 
of phosphorus and calcium metabolism of dairy cows. In Jour. Biol. 
Chem., y. 40, no. 2, p. 469-500. 
(14) Pearl, R., and Patterson, S. W. 1917. The change of milk flow with 
age, as determined from the seven day records of Jersey cows. Me. 
Agr. Exp. Sta. Bui. 262. 
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