890 
CARL W. GAY 
neck ten inches from the point of the shoulder. Is hard and 
tender. Incised for about four inches. Incision carried through 
the muscle till the pus cavity was reached and about half a pint 
of pus obtained, from which tubes of bouillon and agar were in¬ 
oculated. These developed into pure cultures of a yellow mi¬ 
crococcus. 
Case XXI .—Clinic No. 2519, May 5, 1900. Patient, a 
brown mare, weight 1050 lbs., 10 years old ; used for driving and 
general farm work. Three weeks prior to the time the case was 
first seen in the clinic, tenderness of the right shoulder began 
to cause trouble. This gradually increased until at the present 
time there is a bare area about the size of a dollar and a promi¬ 
nent swelling some three by six inches at the point of the 
shoulder. Incised freely, avoiding the bare spot and a consid¬ 
erable amount of coagulated lymph and purulent material re¬ 
moved, from which tubes of bouillon and agar were inoculated. 
These developed into pure cultures of a yellow micrococcus. 
INFECTED WOUNDS. 
In open infected wounds the infecting organisms may al¬ 
ready be present upon or in the deeper layers of the skin. The 
same may be true of infected operative wounds, or we may have 
the organisms introduced with the hands or instruments of the 
operator. The four open wounds examined were inflicted by 
kicks from other animals and had suppurated when first seen. 
Of the four operative wounds examined three were expected on 
account of aseptic methods used to heal by first intention and 
the fourth by granulation. 
Case XXII .—Clinic No. 2190, Jan. 5, 1900. Patient was a 
bay mare, weight 1000 lbs., 9 years old. Had been running at 
pasture with her mate and was found with a very tender swell¬ 
ing at the angle of the lower-maxilla. The swelling became 
very extensive until incision, Nov. 1st, when it broke, discharg¬ 
ing considerable foul pus. When examined in the clinic there 
were two fistulse found discharging ; one penetrating the exter¬ 
nal plate of the infra-maxilla and permitting the passage of a 
probe which can be passed both upward and downward for three 
or four inches. Tubes of bouillon and agar were inoculated 
from the pus discharging. From these cultures a streptococcus 
and a white micrococcus were isolated. 
Case XXIII .—Clinic No. 2317, March 12, 1900. Patient 
was a bay horse, weight 1100 lbs., 12 years old, and used for 
