46 MR. youatt’s lectures 
thicker, the internal the more projecting, of the two. They ex¬ 
hibit bold, convex, rounded articulatory surfaces, presenting infe- 
riorly and posteriorly, which rest upon the tibia; on their sides 
rough eminences for the attachment of the lateral ligaments; and 
between them, a deep asperous fossa, into which are implanted 
the inter-articular or crucial ligaments. At the base of the ex¬ 
ternal condyle, below and in front of it, is a pit from which springs 
the tendon of the extensor pedis. The condyles, posteriorly, 
have epicondyloid ridges uniting them with the body of the bone. 
Connexion —With the pelvis, above; with the patella and 
tibia, below. 
Development —The extremities in the growing animal are 
epiphyses: prior to the adult period, however, they become con¬ 
solidated with the body; and the inferior extremity earlier than 
the superior. 
[To be continued.] 
©oinmumcationg anft ©ages. 
Ars veterinaria post medicinam secunda est.— Vegetius. 
SUBSTANCE OF LECTURES ON THE VETERINARY 
MATERIA MEDICA. 
By W. Youatt. 
Introduction .—V egetable Physiology. 
MR. YOUATT observed, that, were he lecturing on the human 
materia medica, or had that improvement taken place in the ve¬ 
terinary art which its sanguine friends had anticipated, and which 
those to whom its interests had been entrusted might have effect¬ 
ed, he should have been enabled to arrange the different articles 
of the veterinary pharmacopeia according to their acknowledged 
medicinal agency. He could have classed them as Astringents, 
Purgatives, Tonics, Narcotics, Diaphoretics, &c. and much re¬ 
petition, and some apparent confusion, might have been avoided. 
When, however, some practitioners had recourse to drugs almost 
as numerous as those which occupied the human dispensatory, 
