INDEX. 



PAGE 



Air, amount of, used for biological analysis ..... 23 



" analysis, biological, methods of . . . . . 13, 19 



" " " " filtration method of . . . .15 



" plate method of ..... 15-18 



" bacteria of, as disease producers . . . . . . 52, 53 



" contaminated by tubercle bacilli in dust of . .... 66 



" effects of stirring of, in altering germ contents . . . .31 



" " sweeping on ....... 31-33 



" exhaled, freedom of, from dust and germs ..... 69 



" filtration of, in ventilating shafts ...... 79 



" in-doors, bacteria in . . . . . . .33 



" " dangers of, from floating dust ..... 76 



germs in 27 



origin of germs found in . . . . . . 30 



ki * 4 spontaneous freeing of, from dust and germs . . .37 



kl u varying number of germs in . . . . . . 34 



" modes of spontaneous freeing of, from dust and germs . . .31 



" of theatres and other public places as sources of disease . . .81 



" out-doors, varying number of germs in . . . . 22, 23 



" " spontaneous freeing of, from germs . . . .21 



" probability that consumption is commonly transmitted through . 65 



" street-, in cities, dangers of, from its floating dust . . . 7S 



" li in New York during cleaning . . . . . 25, 26 



Antaeus 16 



Asiatic cholera ......... 55 



Bacilli ... 13 



" -tubercle 48 



" " dangers from, in sputum of consumptives . . .61 



habitat of . . . . . . . .64 



" " in bodies of apparently healthy persons . . .67 



" " " dust of rooms used by consumptives . . .66 



105 



