ZEITSCHRIFT FUR DIE GESAMTE BOTANIK. 
_ HERAUSGEBER DR. CARL MEZ, 
PROFESSOR DER BOTANIK AN DER UNIVERSITAT 
^ ES KOENIGSBERG. 
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THE EXPERIMENTAL SYSTEMATIC METHOD. i 
By C 
r. 
With a genealogical tree.) 
1) The Experimental Systematic Method deals with sero-diagnosis, It represents ' 
an inductive and objektive method for the recognition of the natural, i.e. gene 
_ tical affinity of organisme. "TE 
. 2) Sero-diagnosis was found out by medical investigators in the process of the X 
extension of the sci enoe of immunization; the phenomenon, that many diseases for : 
afford immunity from re-infection by the 
^ same morbific agents, led to the discovery, that after the cure had been begun, 
«substances ("antitoxines") which had not been present there before, circulate in 
E the blood; with the help of these the viruses of the respective morbific agents ; 
= ("toxines") can be neutralized. By this, the "specific" character of the anti to- 
EN 
8) With the aid of the specific character of the antitoxines medical al d e © 
was enabled to identify both diseases in doubtful cases (WIDAL-Reaction), in SE 
» proteinous substances of uncertain origin (blood-tests etc.). For forens ! mg de- j 
ine especially, this discovery is of very great importance. „ 
4) was, however discovered by UHLENHUT, that human blood cannot be di.stin- 
guished from that of the higher primates in thig way, that consequently aman be- 
88, gorillas and chimpanzees possess peculiarities of blood very lar to SE 
each other and considerably different from those of the lower m 
