VI PR0('EEI)1X(;.S. 



observations. And their initiative has been foHowed alreadj^ in some 

 portions of Cauiida and in Europe. Some of our high school teachers, 

 aud even of our common school teachers, are now doing very valuable 

 local obser\ation work ; and if the spirit continues not only shall we 

 Ije able to publish more original research in the future, but we will bs 

 able to develope our resources more efteetivelv. 



THK CHECKIN(} OF MALARIA. 



I attemptefl to illustrate the value of original reseai'ch work such 

 as we are exideav()ring to stimulate here under our local conditions, by 

 reference in ui}' address of 1900 to the cumulation of the long series 

 of scattered and unproductive work in the discovery of the true natural 

 liistor}' of malaria, and in my address of 1901, to the still further 

 utilitarian result of determining the probable nature and general man- 

 ner of the communication of yellow fever. 1 am glad to be able to 

 say that knowledge has proved in these ca-ses to be power to do what 

 millions of money and all of the beliefs of the world for the past ages 

 ^vere unable to effect. The manner in which human life was tortured 

 and destroyed, in which business and commerce were upset, and in 

 which valuable property was wasted by quarantine and other regula- 

 tions based on a defective if not false theory of the natural facts, forms 

 in the light of present devel()pmr:.ts an overwhelming testimonial to 

 the ultimate value of the results oi the long search after the truth and 

 truth only. 



In some of the leading malarial centres the sanitary regulations 

 based on the new knowledge have promptly reduced this disease to 

 a fraction of its former prevalence. And although the control of the 

 i«osi|uito nuisance is an admittedly tremendous contract, we can 

 confidently expect from the success already attained the future 

 extermination of malaria as one of the human ills. 



THE EXTINCTION OF YELLOW FEVER. 



Yellow fever may be considered to be already mastered, so com- 

 pletely have the experiments to which I last year alluded given the 

 power of control to man. 



Taking Havana, where for 130 years yellow fever has been con- 

 stjintlv in the city, and near which the final experiments alluded to 



