6 TABLE OF CONTENTS. 



Page. 



V. THE TUBERCULIN TEST.... : /.V. 55 



Extent of tuberculosis among humans 55 



i>js^>e^ef tuberculin. 56 



Method of application of tuberculin test 56 



Importance of tuberculin as diagnostic agent 56 



Test produces no harmful effects 57 



Proposed restriction of use of tuberculin 57 



Adulteration of tuberculin should be prohibited under savcre p.n- 



alty 58 



Conditions imposed by Bureau of Animal Industry in applying 



tuberculin test 59 



Results of tests affecting District milk supply 60 



Results of tests throughout the United States 61 



Tuberculin test mandatory in District of Columbia 62 



Reliability of test affirmed by authorities 63 



Report of international commission on control of bovine tubercu- 

 losis 64 



Contemplated advantages of the tuberculin test 67 



Cost of applying test 68 



Should Government or herd owner defray expense of test 68 



Compensation for condemned cattle 69 



Effect of compulsory tuberculin test on price of milch cows 70 



Communicability of human tuberculosis from bovine sources 72 



British tuberculosis order of 1909 75 



Results of investigations by German and British commissions 75 



Resolutions by national and local associations for study and preven- 

 tion of tuberculosis 76 



Bacilli introduced into human body during infancy 76 



Efficacy of tuberculin test in eradicating human tuberculosis from 



bovine sources 77 



Recommendations by Dr. John R. Mohler 77 



Milk used in dairy products should be tuberculin tested 78 



Economic considerations affecting bovine tuberculosis 78 



Use of meat of condemned animals for food 79 



VI. MAINTENANCE or Low TEMPERATURE 82 



Essentiality of temperature not exceeding 50 F 82 



Necessity for adequate refrigerator-car service 84 



Feasibility of providing adequate supply of ice 86 



Prescribed hours of delivery not feasible 87 



Temperature for milk products 



Freezing of milk 



VII . PASTEURIZATION..: 90 



Pasteurization and sterilization denned 90 



Temperature and length of exposure best suited to pasteurization. . 91 



Effect of pasteurization on germ life 92 



Held and continuous pasteurization 93 



Objections to commercial pasteurization 93 



Compulsory pasteurization 94 



Advantages and disadvantages of pasteurization 94 



Views of Dr. H. W. Wiley 96 



Chicago milk ordinance 98 



Cost of installing pasteurizing plants 100 



Cost of pasteurization 101 



Effect of pasteurization on the nutritive and digestive qualifies of 



milk 101 



Multiplication of germs in raw and pasteurized milk 101 



Value of pasteurized milk 102 



Pasteurization does not dispense with necessity for tuberculin tejt. . 103 



Communicability of bovine tuberculosis to human beings 103 



Bacillus carriers 104 



Effect of pasteurization on the price of milk 104 



Prices of several grades of milk 105 



Pasteurization tends to preserve milk 105 



Pasteurization in other jurisdictions 105 



Location of pasteurizing plants 106 



Private local plants now in operation 107 



Maintenance of plants under public or private auspices 107 



Suggestion of a municipal dairy 108 



