REVIEW. 
627 
like the loud twang from a trumpet—or it may be rasping, 
snoring, or like that elicited when sawing wood. As the 
disease proceeds, the general symptoms become more violent 
—the mucous membrane of the mouth assumes a purple 
colour—the animal becomes partially unconscious—he rushes 
wildly from place to place, as though seeking in vain for aid 
—the body becomes suffused wdth a streaming perspiration ; 
at last the spasm is either suddenly relieved, which is very 
rarely the case, or he falls heavily to the ground, struggles 
for a few moments, and then dies completely asphyxiated. 
If the disease supervene upon an inflammatory attack of the 
organ, the symptoms in such cases, for a short period at 
least, will most probably be of a milder character. A partial 
spasm of the muscles will manifest itself, which may exhibit 
just such a degree of violence as to excite alarm and nothing 
more, when the whole w r ill gradually subside and leave the 
patient in a very tranquil state; in a short time, however, 
may be in two or three hours, or more or less according 
to circumstances, it again commences and continues for a 
longer period, or it goes on increasing in violence, until 
either relief is afforded surgically or the patient dies. 
“ Causes .—The causes are numerous and varied; it may 
arise from laryngitis;* from strangles;f from the presence of 
pedunculus tumours growing at the base of the tongue, and 
its mass occasionally going in immediate contact with, or 
falling into the larynx;f from the formation of an abscess in 
immediate contact w T ith the larynx ;§ from the presence of 
an abscess at the root of the trachea ;|| from choking; from 
the formation of an abscess within the hollow space at the 
junction of the head with the neck, (I have treated many 
cases of this kind both in young foals and horses of three or 
four years old;) and in some instances the disease is mani¬ 
fested without any detectable cause.”^[ 
In Section Y, “ Hysteria” arrests our attention. This 
Protean and versatile disease, one so strangely connected, as 
it no doubt is, with the state of the womb, though patho¬ 
logically regarded must rather be referred to the head— 
this well-known human affection (w'e had almost written 
affectation) Mr. Haycock conceives he has seen a case or two of 
in the mare: his friend, Mr. Johnson, suggesting to him the 
* See “ The Veterinarian” for 1844, p. 29. f Ibid, for 1843, p. 131. 
X Ibid, for 1843, p. 68. § Ibid, for 1845, p. 557. 
|| Ibid, for 1849, p. 392; and for 1850, p. 423. 
Tf See ‘ Veterinary Record,’ vol. vi, p. 42. 
