236 PHYSIC 



on susceptible subjects, animal and human, without "let 

 or hindrance," in their unprotected condition of complete 

 unsuspicion and unpreparedness for attack. Hence the 

 west ends, the open places, and the great buildings and 

 institutions at once become victimised, while the slums 

 and narrow streets, alleys, and entries escape the winds 

 respectively sweeping through and over them, with the 

 effect that influenzal incidence seems a new epidemic 

 departure until its character has been to some extent 

 revealed by hygienic analysis and comparison with related 

 natural history methods and manners of propagation. 



