I 1 2 INDEX. 



PAGE 



Petri's air analysis .......23 

 Phagocysts ......... 40-42, 48 



Phlegm, removal of, by ciliated cells ...... 40 



Plate method of air analysis ....... 15-18 



Pneumonia ......... 55-56, 88 



Predisposition to consumption ....... 59 



Preventable diseases . . . . . . 54 



Prevention of disease, a public and private duty . .90 



" " ** more reasonable than neglect and attempts to cure . 98 



Public conveyances as sources of danger from infectious dust * .84 



Railway carriages as sources of danger from dust . . - . 85 



Rain, effects of, on number of aerial germs . . .22 



Reinfection of tubercular persons by expectoration . . 104 



Rooms as repositories of dust and germs . . 29 



Safeguards of body against dust and germs . . . . 36, 75 



Sanitariums for consumptives , . . 104 



Scarlatina . . . . . . . . . . 55, 96 



School-rooms, dust in . . . . . . .84 



Sleeping-cars as sources of infection . . . 86 



Small-pox . . * . * . . . 52, 62, 96 



Smoke, ill effects of . , . . . . .52 



Sneezing, infective spray in . . . . . .77,87 



Snow, effects of, on aerial germs ....... 22 



Spitting-cups for consumptives ....... 71 



Spitting, dangerous and filthy nature of . . . . . . 72, 99 



Sputum, dangerous nature of, in consumption . . . . 60, 66 



" proper means of disposing of, in consumption . . .71 



Steamships, state-rooms of, as sources of danger . . . .86 



Stein, experiments of, on floating dust ...... 28 



Subways, dust in. . . . . . . . .86 



Sunlight, action of . . . . . . . 64, 75, 97 



Sweeping, effects of, on aerial germs in rooms .... 3 X ~33 79 



Theatres, dusty, dangers of, . . . . . .81 



" vicious methods of cleaning of . ... 82 



Tubercle bacilli ......... 48 



" " growth of, in the body only under favorable conditions . 97 



" habitat of. 64 



** " how spread in the air . . . . . . 64 



** " in dusty rooms occupied by consumptives ... 66 



