PRESIDENT'S ADDRESS. Iv 



observation to complete a grand theory, providing we have brought the 

 same energy and ingenuity to bear on our problems. 



The discovery of grand principles of great truths is now more 

 than ever before a composite work contributed to by many knowledge 

 makers. The South American Indian who first by accident discovered 

 the anti-malarial effect of the extract of Peruvian Bark, discovered a 

 great fact without any special preparation and possibly without the aid 

 of any previous more or less partial observer. But still, for over three 

 centuries the Hcemammba vivax and Hcemamteba malarice, living jelly 

 specks so infinite that a blood corpuscle is a meadow for them, got 

 through the human skin (more than a Chinese wall for them), and into 

 the blood stream, and from thence into the blood discs themselves, which 

 they finally destroyed. 



It was not until twenty years ago that Laveran discovered their 

 presence in the life fluid, but how impossible would it have been for him 

 to have discovered such organisms until the microscope had been improved 

 to a high degree of excellence and microscopic methods had been 

 discovered by other workers. Yet no one could show how the minutely 

 microscopic animal more destructive to the human race than all the 

 historical beasts of prey, found its way into the blood. Multitudes of 

 observers finally seemed to relegate the home of the organism to the 

 malarial swamps, but it could not be found in the swamps. These 

 observers, however, made a very important contribution to the general 

 stock of knowledge, for as the mosquitoes pass their larval stage in water, 

 suspicion was finally extended to them. Yet people were taking great 

 care to protect themselves from the malarial air which poisoned no one, 

 while infected mosquitoes were allowed to inoculate them unsuspectingly 

 on the adjacent dry lands. Danilewsky, Golgi, Antolisei, Grassi, 

 Bignami, Bastianelli, Labbe, Mannaberg, Manson, Nuttall, Metchnikoff, 

 Daniels, McCallum, and others, and finally Ronald Ross, worked on the 

 humble mosquito until 1899 before the problem was solved. 



Other specimens of Hcemamceba were found in the common mosquito 

 and in other animals who were inoculated by the mosquito, and who in 

 turn could infect sound mosquitos. Finally species of a genus of 

 niosquitos, Anopheles, were found infected with the malaria Hcemamceba 

 in a most unexpected form. Sound Anopheles were found to be infected 

 by feeding upon the malarial patient, and infected ones communicated 

 malarial fever to those whom they were allowed to bite. For about 



