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 



11 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 



" " spontaneous freeing of, from dust and germs . . . 27 



" varying number of germs in . . ..... 34 



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



II of theatres and other public places as sources of disease . ^. .81 

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



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



k probability that consumption is commonly transmitted through . 65 



41 street-, in cities, dangers of, from its floating dust . . 75 



" " 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 



