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 



li li " 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 . r . 85 



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



Reinfection of tubercular persons by expectoration . . . . 102 



Rooms as repositories of dust and germs . . . . . .-"-99 



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-roonis 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 . . , , . 31-33 



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



u 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 . . . . v . 64 



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



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



