PRESIDENTS ADDRESS. X@l 
MALARIA OBJECT LESSON. 
As an illustration, let me follow out my example of last year, the 
history of the cause and prevention of malaria. No single man made 
this discovery. Laveran in 1880 discovered the minute Haemamoeba 
in the malarial human blood corpuscles. But five years more of work 
by others merely proved the truth of Laveran’s discovery. Nothing 
was done for the business men, the soldiers, the missionaries, going 
into malarial regions of the world, nothing was done for the millions 
of natives having their life sapped by the mysterious affliction. They 
were suffocating themselves at night by keeping out the cool healthful 
night air, while they allowed the sneaking Anopheles to snipe them 
without serious protest. In the meantime Danelewsky found that the 
birds had their blood corpuscles affected in many cases by a somewhat 
similar organism which he called a Proteosoma. The bloods of all 
animals were now being searched, even the blood of lizards and snakes, 
but the malaria still went on from 1885 up to 1895. A tremendous 
amount of truth about a great number of animals was being discov- 
ered, but nothing productive. Major Ross got at length to work, but 
still there was nothing productive. Noticing Danelewsky’s discovery 
of the Proteosoma in the blood of birds, he caused mosquitoes hatched 
safe and sound from eggs to feed upon birds, the Blue Jay bearing his 
share of it, which had the Proteosoma in its blood. The mosquitoes 
became infected. These mosquitoes infected sound birds. Now in 
1898, the mosquito was falling under deeper suspicion. The mos- 
quitoes would not be affected by sucking the malarial blcod from a 
sick human patient, however. Nobody ever thought that one species 
of mosquito was likely to be more dangerous than another. Why 
should they? But the experiments went on with all the different 
species which could be found, for was it not already proven that Culex 
could infect the Blue Jay with Proteosoma—a bird malaria. At last 
species of the genius Anopheles were found to be capable of being 
infected by sucking malarial human blood. Next in 1899 it was 
rapidly proven by Ross and the leading scientists of other countries, 
that persons might sleep in the most malarial district open to the 
night air if the mosquito netting guarding the room remained intact ; 
and if a person were in a mountain sanitarium and _ be but bitten by 
an infected Anopheles he would be soon down with the malaria. 
