5 AS TO SOUNDNESS. 115 
3. Thoropin or Thorough Pin. 
: 4. Curb. 
: 5. Capped Hock. 
Bone spavin is perhaps the commonest of all diseases 
or which a purchased horse is returned to those who 
aave sold it. This is rather a bold assertion, but it is 
he result of experience. I am sure again that there 
s no prejudice in the horse universe of such strength 
with such slender foundations. From the first year of 
ny apprenticeship (186c) to this day, I have kept this 
yarticular matter ever before me, because in that year 
ny attention was so strongly drawn to the subject by 
reading the notes of the late Professor Barlow’s lectures. 
Gentlemen, you may not have heard of Professor Barlow. 
He, I may tell, you, taught anatomy in this college 
nany years ago, and he was without, doubt perhaps the 
nost promising member this ‘profession has ever had. 
He killed himself by his devotion to his profession. 
His principal tool was the microscope—the instrument 
without which no sound pathology can be established 
—the trowel which alone can surely lay the medical 
icience foundation-stone, which a sound pathology surely : 
s. From Professor Barlow’s notes I feel sure that he 
1eld a very liberal opinion with regard to the hock joint. 
He pointed out strongly, and Professor Dick agreed with 
um, that hocks might be very coarse at their lower parts 
vithout being necessarily spavined. The bones involved 
n spavin—give them what names you please—are made 
