QT154, 



CONTENTS 



LETTER TO STUDENTS . . . v 



DUST ...,.. i 



DUST-GARDENS ...... 7 



DUST PLANTS . . . * . . 15 



BACTERIA ....... 16 



MOLDS . . . . . . . 33 



YEASTS . . . . . . . 3Q 



WORK OF BACTERIA . . . . . 47 



BUTTER MAKING . . . , 57 



CHEESED. . " . . . . . . 58 



VINEGAR . . . . . . .60 



HARMFUL DUST PLANTS ..... 63 



PRESERVING FOOD . . . . . .69 



DISEASE GERMS . . . . . 75 



RESISTANCE OF THE BODY . . . . .86 



SANITATION ..... 96 



HISTORY OF BACTERIOLOGY . . . .109 



SUMMARY . . . . .113 



EXTRACTS FROM THE INSTRUCTOR'S NOTE BOOK . 11; 

 SAFEGUARDS OF THE BODY AGAINST DISEASE, BY 



T. MITCHELL PRUDDEN . . . .127 



BIBLIOGRAPHY . . . . . .153 



SUPPLEMENTAL STUDY OUTLINES . . . . 157 



INDEX i63 



