444 PHEBOLITES. 



current of blood. As the caliber of the vessel readily admits of their 

 passing upwards, so it would of their passing downwards, were they not 

 attached by a footstalk. It is this which prevents them falling down 

 into the heart, and thus at once putting an end to life by their presence 

 in that organ.' 



[ " This horse was subsequently purchased by Mr Simonds, and 

 destroyed, on account of there being " but little probability of his 

 ever becoming useful again." The diseased parts having been removed, 

 the following description of them was given by Mr Simonds : ] 



" ( You will observe the jugular vein (Fig. 120), in which the tumours 

 were situated, and which you will remember were about half-way up the 

 neck, and that they admitted of being passed up the vessel as high as 

 its bifurcation. On the pressure employed to elevate them, however, 

 being removed, they immediately fell down to their original situation ; 

 but all our efforts to push them further down were ineffectual. The 

 post-mortem examination at once proves why this should have been 

 the case, for the vessel is impervious below the part they occupied, 

 from lymph having become thrown out, so that no blood could pass 

 down it. The obliteration extends from that part where the tumours 

 were situated down to that portion where the axillary vein unites with 

 the jugular, so as to enter the anterior vena cava. 



" ' The tumours themselves I have before me (Figs. 121, 122, 123). 

 They are three in number, and varying in size as well as in shape. They 

 are very dense, and on making a section of one of them, which has been 

 effected with some little trouble, it appears to be composed of bony 

 matter, or some of the earthy phosphates; but Mr Morton has undertaken 

 to analyze one of them, and he will make known to you its composition. 



" ' The origin of these tumours must ever remain somewhat shrouded 

 in mystery, and different views will be taken by different persons of 

 their formation. 



" ' At the time I introduced the case, I thought they were peduncu- 

 lated, but in this it appears I was mistaken. Whether they origin- 

 ally possessed a peduncle, which, becoming ruptured, allowed them 

 to fall down the vessel to a certain extent, and nature, to prevent 

 them from descending further, threw out lymph ; or whether they 

 might not have been produced from the vessel becoming impervious 

 below, from some injury or pressure caused by the collar are questions 

 for your consideration. This animal had been accustomed to the com- 

 mon duties of a coach horse, and had been working for some time in one 

 of the Brighton stages. 



