1 10 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 



Predisposition to consumption ....... 59 



Preventable diseases . . . . . . . .54 



Prevention of disease, a public and private duty . . . .88 



" " " more reasonable than neglect and attempts to cure . 96 

 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 .... 102 

 Rooms as repositories of dust and germs ...... 29 



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



Sand filters for biological analysis ...... 15 



Sanitariums for consumptives . . . . . . 102 



Scarlatina . . . . . . . . . . 55, 94 



Scavenger cells ......... 41 



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



Sleeping-cars as sources of infection ...... 86 



Small-pox . . . . . . . . . 55, 62, 94 



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



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



Spitting, dangerous and filthy nature of . . . . . . 72, 97 



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



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



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



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



Sugar-felters in air analysis ....... 15 



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



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



" responsibility of the public for filthiness of . . . .83 



" vicious methods of cleaning of ..... 82 



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



" " growth of, in the body only under favorable conditions . 95 



" " habitat of ....... 64 



u '* how spread in the air . . . . . .64 



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



