4 BULLETIN 260, U. S. DEPARTMENT OF AGRICULTURE. 
the Xew York Institute, had treated 3.010 persons for hydrophobia 
during the first 17 years of its existence, up to 1907. The Baltimore 
Pasteur Institute had treated over 1.000 cases up to 190S. Many 
more such figures could be cited for the numerous other Pasteur 
Fig. 1. — a, &, Nerve cells of the brain, showing Negri bodies, a diagnostic factor in rabies. 
1, cytoplasm of cell : 2. nucleus of cell ; 3, nucleolus of cell : 4. Negri body in cytoplasm 
of cell. (After Hart.) 
institutes in this country. In 190S. Ill deaths of persons from 
rabies were reported in the United States, and owing to our inade- 
quate statistical methods we have nothing like exact data in regard 
to the extent and distribution of the disease or the number of cases 
