EDITORIAL. 
389 
(a) according to the animal species from which they come. 
(b) according to the more or less long time that they have 
previously been submitted to the influence of external surround¬ 
ings and physical agents (air, light, heat, desiccation). 
(c) according to their introduction in the organism has taken 
place in massive doses, at near or distant intervals, or in small 
doses, single or numerous. 
(d) according the condition of organism which receives 
them, whether it is free of all anterior infection or if already 
tuberculized. 
* 
❖ * 
Congress of Comparative Pathology. —Some time ago I 
called the attention of our readers to a proposal entertained by 
the Societe de Pathologie Comparie of Paris to organize an in¬ 
ternational Congress of Comparative Pathology. This Congress 
will be held in the Faculty of Medicine between the 17th and 
24th of October. At the various sittings of this first interna¬ 
tional reunion of comparative pathologists, the diseases common 
to men and animals will not only be considered, but also the re¬ 
lations that may exist between the diseases of the different 
species. 
There will be besides important papers and communications 
relating to vegetable pathology and the possible relations which 
may exist between certain diseases of plants and those of ani¬ 
mals. 
The principal questions which will be presented in the vari¬ 
ous orders of the day will be: Tuberculosis, human and aviary 
diphtheria, cancer, variola and vaccinia, parasites common to 
man and to animals, nervous diseases, rabies, comparative study 
of cirrhosis; pathology of inferior animals, experimental pathol¬ 
ogy, milk, vegetal pathology. As may be seen by this long pro¬ 
gramme, the work of this congress will be very important. 
The committee of organization contains the names of many 
eminent pathologists of various countries, and among them are 
