178 EXPERIMENT STATION RECORD. 



{1911-12), pp. 19-32, 129-153, pis. 4). — This is a report on the analysis and 

 condition of samples of commercial butter, cream, milk, ice cream, and con- 

 densed milk. There is also included a statistical report on the number of cows 

 milked, the average yield, grade of stock, stock water supply, and the scoring 

 of a number of Idaho dairy farms. 



Report of the feed and dairy section, P. H. Smith {Massachusetts Sta. 

 Rpt. 1912, in. 1, pp. ii8-i28).— This includes the text of an act to regulate the 

 use of utensils for testing the composition or value of milk and cream ; also a 

 summary of inspection work with glassware, etc. 



The ductal system of the milk glands of the bovine, O. Wirz {Arcli. Wiss. 

 iL Pralzt. TierheUk., 39 {1913), No. 4-5, pp. 375-421, figs. 7).— This is an elab- 

 orate treatise on the anatomy of the milk glands and the nature of milk secre- 

 tion in the bovine, dealing with the constitution and function of the alveoli, 

 the relation of milk secretion and the blood streams, the ductal system and its 

 functions, the occurrence of leucocytes, the consistency of the udder, and the 

 size and nature of the milk cistern. A bibliography of 25 references is appended. 



[Factors affecting* the composition of milk], J. Aueousseau and L. J. 

 PoNsCxVRME {Ann,. Ecole Nat. Agr. Grignon, 3 {1912), pp. 73-106). — This is a 

 series of papers on the composition of milk from the standpoint of milk in- 

 spection, as follows : 



Influence of feeding stuffs on the composition of milk (pp. 73-81). Two cows 

 on pasture supplemented with hay. bran, mangels, and linseed cake, with straw 

 ad libitum, for 5 days gave a daily average of 15 liters (about 15.9 qt.) of milk 

 each, containing 4.43 per cent milk fat and 9.03 pei' cent solids-not-fat. The 

 supplemental feeds were then withheld and the cows had the run of pasture 

 with straw ad libitum for 6 days, during which their average milk production 

 was 18.6 liters each, containing 3.53 per cent fat and 8.74 per cent solids-not-fat. 

 These results were confirmed in a test with 4 cows the following year. In 

 another test with 4 cows for 3 days on a ration of dry fodders, bran, and scant 

 pasture, the average daily milk yield per cow was 10.37 kg. with an average 

 composition of 4.02 per cent milk fat and (the first and third days only) 9.13 

 per cent solids-not-fat. These cows were then fed a ration of turnips with oat 

 straw ad libitum for 6 days, during which their average milk production was 

 12.35 kg. each with an average composition of 3.5 per cent milk fat and 8.77 per 

 cent solids-not-fat. 



Composition of first and last draicn milk (pp. 87-90). Analyses are reported 

 of the first and last portions of milk drawn into separate receptacles. Of the 

 first half of 2 milkings the fat content was 1.51 per cent, the solids-not-fat 

 9.45 per cent. The correspondmg percentages for the last half of the 2 milk- 

 ings were 4.86 and 9.04. 



Influence of spontaneous creaming on the composition of milk (pp. 91-96). 

 In a test with 5 liters of fresh milk testing 3.9 per cent fat and 9.08 per cent 

 solids-not-fat, a sample of 1 liter poured off at the end of li hours tested 4.5 

 per cent fat and 8.78 per cent solids-not-fat. A second liter poured off at the 

 end of 2^ hours tested 3.8 per cent fat and 9.19 per cent solids-not-fat. Two 

 liters poured off at the end of 3* hours tested 4.35 per cent fat and 8.87 per 

 cent solids-not-fat. The remaining milk tested 2.5 per cent fat and 9.65 per 

 cent solids-not-fat. In another test the milk remaining after the withdrawal 

 of the third sample tested 2.2 per cent less fat than the original milk. This 

 milk, after being subjected to these 2 tests, was heated to 30° C. and the test 

 repeated. After the withdrawal of the third sample the remaining milk tested 

 only 0.4 per cent less in fat than the original milk. 



Influence of potassium tromid on the composition of milk (pp. 97-106). 

 Doses of 20, 25, and 30 gm. of potassium bromid fed to cows had no appreciable 



