779 
* 
REPORT OF THE COMMITTEE ON DISEASE. 
NEW MEXICO. 
Mr. J. A. La Rue, the secretary of the Cattle Sanitary 
Board, wrote the following letter: 
“ Excepting in a dairy herd of Jersey cattle, out of which 
ten head were found to be affected with tuberculosis, and 
were condemned and slaughtered by the Sanitary Board, 
there were no contagious or infectious diseases reported in New 
Mexico since a head of Texas cattle left fever on their trail 
ten years ago.” 
ARKANSAS. 
Special report by Dr. R. R. Dinwiddie, of the Arkansas 
Agricultural Experiment Station, a member of this Com¬ 
mittee : , 
“ Southern Cattle Fever .—In accordance with the request 
of the Chairman of the Committee on Diseases, I endeavor 
in this paper to present some of the more important facts in 
connection with the pathogenesis of this important disease of 
cattle, and more especially my own experience and opinions 
as to the ‘ tick theory ’ of its etiology. What I can say on 
this subject is, for the most part, well known to the veterinary 
profession, or at least to the reading part of the profession as 
represented here. Since the important publications of Smith 
and Kilborne on ‘Texas Fever’ in 1880, there has been prac¬ 
tically nothing added to our knowledge of the pathology of 
this disease; what has been done since then being for the 
most part confirmatory of the conclusions reached by these 
investigators. 
“ My own investigation of Texas fever began in the sum¬ 
mer of 1889, when attempts were made by Dr. Paul Paquin, 
then of the Missouri Agricultural Experiment Station, to ob¬ 
tain immunity in susceptible cattle by inoculation. My part 
in these experiments consisted in observing and making autop¬ 
sies on the inoculated cattle after they had been imported 
from Missouri to infected ranges in Arkansas. It was assumed 
at that time that the disease was one of bacterial origin, an 
opinion which was supported by the writings of Dr. F. S. 
Billings, then of Nebraska. Of these experiments in preven¬ 
tive inoculation against Texas fever, it is unnecessary to say 
