SOCIETY MEETINGS. 
529 
Wc have an obstructed circulation, and this was produced by an external disturb¬ 
ance ; so don’t think we can say that the diseased process commences in cancel¬ 
lated structure of interior, but that the disease of the cancellated structure is 
secondary. In bone spavin, for instance, extraordinary traction or tension of in¬ 
ternal flexor may produce first a slight hyperaemia, slight swelling of tissue in the 
foramina follows, is kept up, and finally the cancellated tissue is involved by 
diversion of nutrition. 
Dr. Peters asks how, if the vessels are occluded , the exudate forms ? 
Dr. Bryden says the arrest of nutrition is developed externally, and this 
nutritive material forms the exudate—a physiological process. Don’t think the 
view of the essayist, the old pathology, can be held to. 
Dr. Clements said the theory of exostoses generally accepted is that they are 
due to local inflammations, and if due to these, this inflammation must start from 
the periosteum. If exostoses are classified as tumors, and the theory of tumors 
accepted, that they are due to too great formative material, then these exostoses 
may be due to floating islands of cartilage in interior of bone, which are left when 
bone is formed, and then from some cause these form the exudate. Or the 
exostoses may spring from the cartilage itself, and this, he thinks, is a better 
working hypothesis. 
Dr. Winchester says he thinks the above theory of adventitious cartilage, 
etc., a sound one, and notes adventitious teeth, etc., in support of that theory. 
Dr. Bryden said that true anchylosis exists only in young animals, in older 
ones we certainly have death of tissue beneath. In a horse at ten years old, with 
spavin, you will always find disease of cancellated structure beneath. Don’t 
believe the cancellated structure can form an exudate. 
Further discussion took place in regard to the diseased process in navicular- 
thritis. 
The paper and discussion which followed were very interesting, and a unani¬ 
mous vote of thanks was tendered the essayist, Dr. Marshall. 
Drs. Blackwood and Bunker were appointed essayists for the next meeting. 
No other business coming before the meeting, it was adjourned. 
The last regular meeting of the Massachusetts Veterinary Association was 
held in Boston, January 27th, 1886. 
Dr. Bryden was chosen Chairman pro tern., and there were present Doctors 
Bunker, Clements, Howard, Peters, Penniman, Skully, Winchester and Winslow. 
The committee appointed to revise the Constitution made a partial report, 
suggesting that its entire report be presented to a larger meeting than the present 
one, and advised the calling of a special meeting for the consideration of it. 
It was voted, on motion of Dr. Bunker, that a special meeting for the above 
purpose be called for Thursday evening, February 4th. 
There was presented for endorsement by the Association the petition of army 
veterinarians to the Lieutenant-General in command, calling attention to their 
present status and praying for rank in the service, and for the establishment of a 
veterinary corps in the United States army. 
