440 PHLEBOLITES. 



the subject, refer their formation to any chemical agency. 

 Their formation is probably akin to the occasional hardening 

 of tubercles into bony concretions, which is a process inde- 

 pendent of any vascular organisation of the tubercles them- 

 selves. It is also illustrated by the formation of the vegeta- 

 tions on the valves of the heart, as observed by Lsennec and 

 Dr Ali soil; also by the tubercular, purulent, or encephaloid 

 deposits, sometimes found in the fibrinous clots within the 

 heart and great vessels. 



" I can scarcely venture to hazard an opinion on this sub- 

 ject, but I must confess that I feel inclined to believe (how- 

 ever fanciful the opinion may appear to some physiologists) 

 that the great resemblance of those bodies in their chemical 

 analysis to the osseous texture, the manner of their forma- 

 tion, and their possessing in some cases physical properties 

 similar to cartilage, can only be explained by supposing that 

 they are the result of a process resembling the formation 

 of the osseous tissue in the other parts of the body." 



I shall conclude my remarks on this subject by introduc- 

 ing Mr Simonds' case, as it appeared in the above-mentioned 

 work : 



" PHLEBOLITES IN THE JUGULAR VEIN OF A HORSE. By Mr J. B. 

 SIMONDS. The patient was a dark bay horse, fifteen hands three 

 inches high, and about twelve years old. Mr Simonds was requested 

 to see him on the 3rd of November, 1842. (The remainder of the case 

 will be given in his own words). 



' Mr Thacker, who was with me at that time assisting me in con- 

 ducting my business, first visited him; but, considering it to be a case 

 of a very unusual kind, he returned home, and requested that I would 

 see him prior to any remedial measures being adopted. On my arrival, 

 I found that the animal had been used by a gentleman for two or three 

 weeks as a job horse, and, until within a day or two of the attack, no 

 illness had been observed, but, on the contrary, the horse had gained 

 flesh, and gone on well. At that time the coachman observed lameness 

 in the near fore-leg, and found that the horse did not go to the collar 



