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MANUAL OF MODERN FARRIERY 
THE HAW. 
It is no unusual thing for a thickening of this part to 
take place, and it will then protrude itself on the fore part 
of the eyeball. In this disease the retractor muscle pulls 
back the eye to protect it from the irritating effect of the 
light, and this thickening of the haw pushing it forward, 
and the adjacent parts being also thickened, no retraction 
can take place. 
The practice of cutting out this is exceedingly absurd, 
and ought never to be resorted to. It is intended for pro¬ 
tecting the eye against dust or insects. In former times 
few farriers understood the use of the haw; and even yet 
it is surprising how few are aware of its value to a horse. 
In cases of inflammation of the eye; it sometimes itself 
becomes inflamed and increased in dimensions, and the 
contiguous parts likewise thickened. This either forces it 
out of its place, or it is voluntarily produced to protect the 
eye from the action of light. In some cases it does not 
return into its place, and has been mistaken for a tumour 
or extraneous excrescence, and has been cut out by ignorant 
persons, and the eye consequently left unguarded. Bleed¬ 
ing, gentle physicing, and cooling applications will invariably 
effect a cure. The lotion pointed out at page 42 should 
be used. 
In some instances, when the inflammation is long-con¬ 
tinued, ulceration of the haw and destruction of the 
cartilage ensues. The above lotion ought first to be applied 
to it. Should this not stop the ulceration, then use the 
following :— 
White vitriol. . , ^ ounce, 
Water . 3 ounces ; 
md if it becomes callous, a weak solution of nitrate of 
