290 



BACTERIA, YEASTS, AND MOLDS 



Ice a source of disease germs, 226. 



Ice chest, 151 ; cleaning of, 153; ef- 

 fect of, on molds, 36 ; use of, in 

 preserving milk, 190. 



Ice cream, 202, 205. 



Immunity, 248. 



Impurities in yeast, 91. 



Insects as distributers of disease, 

 221. 



Intestines, bacteria in, 119. 



Invasion, means of, 235. 



Isolation, necessity for, 241. 



Jellies, fermentation of, 65; preser- 

 vation of, 163; protection of, 25. 



Kefir, 99. 

 Kumiss, 98. 



Lactic acid, a preservative, 166 ; in 



bread, 92. 



Lactic bacteria, 184. 

 Lakes, bacteria in, 116. 

 Leather, molding of, 33. 

 Leaven, 73. 

 Legumen, 125. 

 Lettuce, 234. 

 Light, as a disinfectant, 257 ; effect 



of, on bacteria, 112. 

 Limburger cheese, 131. 

 Lockjaw, 236, 237, 257. 



Malaria, 213, 252; cause of, 214; 



distribution of, 216. 

 Maple sugar, fermentation of, 65. 

 Marmalades, 163. 

 Mattresses, 264. 

 Mazoon, 99. 

 Measles, 212, 213, 219, 230, 232, 



236, 239, 241, 248. 



Meats, canning of, 179, 180; mold- 

 ing of> 33- 



Micrococcus, 104. 



Microorganisms, and disease, 6 ; and 

 preservation of food, 2 ; classes 

 of, 8. 



Microsporon, 53. 



Mildew, 28, 32, 34. 



Milk as a distributer of disease, 

 222, 227 ; methods of guarding 

 against, 228. 



Milk bacteria, 182 ; effect of, on milk, 

 183. 



Milk, condensed, 163 ; drying of, 

 145 ; fermented, 98 ; from gro- 

 ceries, 187; from milkmen, 187; 

 poisoning from, 199; preservation 

 of, 185 ; preserved at low temper- 

 atures, 190; sources of, 185; 

 vessels, 188. 



Mince-meat, 167. 



Mineral substances, 9. 



Moisture, and decay, 45; effecting 

 mold growth, 26, 32 ; in fruit, 

 46; required for bacteria, 113. 



Mold growth, results of, 28. 



Molding, prevention of, by heat, 



37- 

 Molds, color of, 15; fruit of, 17; 



general nature of, 12; meaning 



of the term, n ; structure of, 16; 



wholesomeness of, 30. 

 Moldy bread, bacteria in, 119. 

 Monilia, 22, 41. 

 Mosquito netting, 218. 

 Mosquitoes and malaria, 216. 

 Mother of vinegar, 132. 

 Mouth, bacteria in, 119; a source foi 



entrance of germs, 238. 

 Mucor, 14, 1 8, 21. 



