918 
SOCIETY MEETINGS. 
with the actinomyces bovis. Later, in 1885-86, Cohn and Robe 
further studied this organism, succeeded in cultivating it in the 
laboratory and reproduced the disease by experimental inocula¬ 
tion. •'The organism is a micrococcus which in the animal body 
collects in clumps, and these clumps become surrounded by 
zooglosa mass. 
Cohn called the organism micrococcus ascofurnams. Besides 
the tumors in the lungs this micrococcus has been shown to be 
the cause of numerous other tumors in the horse. The most 
common is the champignon or chronic scirrhous cord ; also 
small tumors in cutis and sub-cutis at any part of the body 
where there is pressure from the harness (region of collar, 
croup, corners of mouth, etc.); tumors on stump of tail after 
docking, tumors in the udder, and finally theory of u fistulous 
withers.” The macroscopic lesions are exactly similar to those 
of actinomycosis, even to the yellowish granules. Differential 
diagnosis is only possible with the microscope, when it is seen 
that these granules are composed of numerous round masses of 
zooglosa and not actinomyces. Such diagnosis is essential 
since in several instances scirrhous cord in the horse has been 
caused by the actinomyces. 
Up to the present time botryomycosis has only been ob¬ 
served in the horse. Sections of a tumor of the cord and one 
of the udder of a mare were shown. 
Dr. Winchester moved a vote of thanks to the essayist. 
Dr. E. T. Harrington reported a case of colloid cancer of the 
stomach. 
Dr. J. F. Winchester reported a case of aneurism and em¬ 
bolism of the posterior aorta, and both iliacs of the right side 
and the internal of the left. History—A chestnut gelding, 
aged, was subject to attacks of colic during the past three 
years ; lameness, first manifested during the summer of 1889, 
which with rest passed away ; during the fall the lameness be¬ 
came very severe, especially if the horse was driven faster than 
a walk ; this would pass away in a few days. Just previous to 
being killed he could not trot a half-mile without becoming 
very lame and in great pain. Post-mortem showed a dilation 
of the posterior aorta with an organized clot from the posterior 
end, anteriorly to where the iliacs are given off. The iliacs of 
the right side were dilated and contained an organized clot for 
about twelve inches ; the internal iliac of the left side con¬ 
tained a clot several inches in length. 
Members present—Drs. Emerson, Frothingham, Harring- 
