TABLE OF CONTENTS 



Section I — INTRODUCTION 



Chapter Pace 



I. How OUR Knowledge or Microscopic Life Began i 

 II. How THE Importance of Microorganisms was Dis- 

 covered ... . . II 



III. Microorganisms in the Household . . . .21 



Section II — MOLDS 



IV. The General Nature of Molds . . . . 32 

 V. Conditions favoring Mold Growth ... 52 



VI. The Decay of Fruit; Useful Molds; Mold Dis- 

 eases ........ 58 



Section III — YEASTS 



VII. Yeasts and their Distribution .... 74 



VIII. Yeasts in the Household .... 87 



IX. Bread Raising; Fermented Liquors . . 104 



Section IV — BACTERIA 



X. The General Nature of Bacteria . . . 118 



XL Bacteria which live upon Dead Food . . 142 



XII. The Preservation OF Food: Drying; Cooling . 157 



XIII. The Use of Preservatives 177 



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