TIIE RELATION OF THE LABORATORIAN TO THE PRACTITIONER. 
311 
of the utmost importance and is so recognized by all progressive 
and scientific medical men. Which condition was only brought 
about by constant labor, combined with patience and devotion 
by the experimental laboratorian. 
The time is not far distant in my opinion when we will have 
at our command for use a specific biologic product for each in¬ 
fectious disease. We also 1 have the various theories of immunity 
at our command to further our education into the intricate depths 
of medical science, and the proper understanding of them would 
result, I believe, in more intelligent treatment and eradication 
of disease. Which conditions were brought about by these same 
men of science wfio toil away their energy and life in a labora¬ 
tory. 
To mention a few, I will call your attention to the humoral 
theory of Ehrlich and his noted lateral chain theory, along with 
his toxin, antibodies and chemic therapy beliefs, that have proven 
to be of so great a value to the world. The theory of phagocy¬ 
tosis, <by Metchnikoff. Wassermann’s test has been of great im¬ 
portance to science and is being used as an accurate aid to diag¬ 
nosis. Also that of anaphylaxis, as stated by Anderson and 
Frost, is a step toward immunity, which is considered as an 
increased capacity for safely and rapidly eliminating the specific 
antigen proteid. 
There is being manufactured and used daily in this country 
many products as the result of these important discoveries; for 
illustration, the many serums, bacterins, vaccines, antitoxins and 
chemio-tberapeutic agents used in the prevention and care of 
various infectious diseases; some of the more important are 
rabies, influenza, anthrax, typhoid, Texas fever, hog cholera, 
pneumonia, tetanus, blackleg, cerebro-spinal meningitis, sausage 
poisoning, diphtheria, and canine distemper. In addition to the 
foregoing products there is a great use and demand for biologic 
products for testing animals for infectious diseases, and brought 
about wholly as the sequence of such laboratory work. 
To call your attention to the importance of these discoveries, 
I will name a few diseases and enumerate some points and facts 
