KEPORT OF THE SECRETARY. 49 



cal and bacteriological work on the Swiss type of cheese is done at 

 "Washington, the cheese being made at the Pennsylvania State Col- 

 lege in cooperation with that institution. Experiments in the manu- 

 facture of the Cheddar type of cheese are carried on at Madison, 

 Wis., in cooperation with the Agricultural Experiment Station of 

 the University of Wisconsin. Work on the Eoquefort type of cheese 

 is conducted at Storrs, Conn., in cooperation with the Storrs Agri- 

 cultural Experiment Station. Investigations on milk secretion are 

 carried on at Columbia, Mo., in cooperation with the experiment sta- 

 tion of the University of Missouri. i 



The work with milk during the year consisted mostly of a study 

 of the bacteria of pasteurized and raw milk. In addition about 150 

 analyses of goat's milk were made, and the use of buttermilk and 

 whey as by-products received attention. 



Investigations were carried on pertaining to changes in storage 

 butter, and experiments were made with a view to producing dried 

 cultures for use in butter and cheese making. The results of the 

 Roquefort cheese investigations for assisting the manufacture in this 

 country of that well-known European variety of soft cheese will soon 

 be ready for publication. 



Some important results have been secured in the milk-secretion 

 experiments, wherein certain cows were fed rations varying from 

 below maintenance to fattening. These results will be published in 

 due course. Work has also been done concerning the effect on the 

 milk when cows are fed with cottonseed jjroducts. 



THE STUDY AND CONTROL OF ANIMAL DISEASES. 



Some of the animal diseases which have been the subject of investi- 

 gation and eradication during the fiscal year are Texas fever, tuber- 

 culosis, glanders, hog cholera, rabies, dourine of horses, scabies in 

 sheep, cattle, and horses, lip-and-leg ulceration of sheep, ringworm of 

 sheep, roundworms and tapeworms of sheep, gid in sheep, necro- 

 bacillosis of various animals, chronic bacterial dysentery of cattle, 

 swamp fever of horses, and poultry diseases. A few facts concerning 

 the more important of these will be mentioned. 



TEXAS FEVER AND TICK ERADICATION. 



The eradication of the ticks which transmit the contagion of Texas 

 fever of cattle and which inhabit the southern part of the country 

 is proceeding vigorously in cooperation with State and local author- 

 ities. During the fiscal year the territory released from quarantine 

 as a result of this work aggregated 10,965 square miles. Since the 

 beginning of systematic work in exterminating these ticks five years 

 ago there have been cleared of ticks and released from quarantine 



231G5°— AGE 1911 1 



