ANALYSIS OF A COMPACT OSSEOUS TUMOUR. 141 
Mr. Liston, as I apprehend, mean to infer, that blood-vessels 
extend into the articular cartilage of the adult when actually 
in a healthy state.” 
Kolliker (vol. i, page 322), distinctly says, in the last four 
lines of the second paragraph, “ The articular cartilage has no 
nerves or vessels.” Again, in page 324, “ In the adult the 
articular cartilages are non-vascular.” 
I refer to these works to show that their authors 
consider articular cartilage to he non-vascular ; and they, 
be it remembered, are those particularly alluded to by Dr. 
Busteed. I will now quote from a work the doctor has not 
mentioned, viz., the third volume of f Holmes’s Surgery/ 
fifth article, “ Diseases of the Joints,” by Athol A. Johnson, 
Esq., page 752 :—“ The articular lamella, like articular carti¬ 
lage itself, contains no blood-vessels.” And further on, at 
page 753, “The articular cartilages, when fully developed, 
contain neither nerves nor blood-vessels.” 
For some years I have been a worker with the microscope, 
in investigating the tissues composing the animal body, and 
I must confess that I never saw either nerves or blood¬ 
vessels in articular cartilage. In making the remarks which 
I did upon the. paper of Dr. Busteed, headed “Doubtful 
Pathology of Stringhalt, 3} published in the October number of 
the Veterinarian, I did not consult any works on histology 
or on pathological anatomy; but now, having done so, I feel 
gratified that the statements I then made are corroborated by 
such high authorities. Much requires to be done, and many 
minute investigations made, before the pathology of string- 
halt will be fully understood, and I trust that Dr. Busteed 
will feel with me that our friendly discussion on this subject 
will not be altogether futile, but act as an incentive to further 
research. 
ANALYSIS OF THE COMPACT OSSEOUS TUMOUR 
DESCRIBED BY MR. CARTLEDGE IN THE LAST 
NUMBER OF THE VETERINARIAN . 
By Professor Tuson. 
The physical and anatomical peculiarities of an osseous 
tumour found in the sinuses of the head of a horse having 
been referred to in the last issue of this Journal, from which 
it w r ould appear that the tumour possessed the usual characters 
of bone, I have thought that a quantitative analysis of it 
