6 o8 
Journal of Agricultural Research voi. xxvii, no. s 
amount of reduction obtained in the case of the unboiled extracts of the 
small intestines of young rats, the unboiled crop extracts of chickens 
showed considerably less reduction. These results were an unexpected 
confirmation of the results of Plimmer and Rosedale (, 3 ), who found 
lactase in the crop of chickens but in no other part of the alimentary 
tract. 
SUMMARY 
Lactase was found to be present in the crop but absent in the proven- 
triculus, the pancreas, and the intestines of normal chickens. 
LITERATURE CITED 
(1) BiERi, and PoRTiER, P. 
1900. rechErches sur la digestion dE l'inulinE. In Compt. Rend. Soc. 
Biol. [Paris], t. 52, p. 423-424. 
(2) Plimmer, R. H. Aders 
1906. ON THE PRESENCE OP LACTASE IN THE INTESTINES OP ANIMALS AND ON 
THE ADAPTATION OP THE INTESTINE TO LACTOSE. In Jour. Physiol., 
v. 35, p. 20-31. References, p. 31. 
{3) -and Rosedale, John Lewis 
1922. THE REARING OF CHICKENS ON THE INTENSIVE SYSTEM. PART II. THE 
EFFECT OP “ good” protein. In Biochem. Jour., v. 16, p. 19-22. Ref¬ 
erences, p. 22. 
(4) Portier, P. 
1898. RECHERCHES SUR LA lactase. In Compt. Rend. Soc. Biol. [Paris], 
t. 50 (ser. 10, t. s), p. 387-389. 
(5) Roaf, Herbert E. 
1908. ON THE APPLICATION OF BARFOED’S REAGENT TO SHOW THE HYDROLYSIS OF 
disaccharides by enzymes. In Biochem. Jour., v. 3, p. 182-184. 
(6) Weinland, Ernst 
1899. beitrage zur frage nach dem verhalten des milchzuckers im 
korper, besonders im darm. In Ztschr. Biol., Bd. 38 (n. F. Bd. 20), 
p. 16-62. Bibliographical footnotes. 
