372 
MELANOSIS. 
In respect to the likelihood of relapse, or to the interval of time 
at which we may look for the return of lameness, that must de- 
pend on the nature of the “ cure” achieved, as well as on the kind 
and intensity of the work the horse is either put to at once, or 
gradually inured to perform. Prompt and energetic treatment, 
succeeded by long repose, and a gradative introduction to work, 
avoiding all such kind of exertion as is likely to jar the fore feet 
much, affords the best chance of permanent soundness. In military 
veterinary practice we know pretty well in what seasons, and 
months even, we shall have occurring cases of navicularthritis. In 
the spring of the year, or as soon as field or road work com- 
mences, and especially at times when the exercising grounds have 
become hard and dry from want of rain, we are certain to have 
lame horses. “ Screws” which have been loose before become 
now loose again, and fresh cases make their appearance : such of 
them as relapse again commonly shewing lameness at intervals of 
three, six, and twelve months ; they being the periods of time at 
which the cases, according to their nature and the season at which 
they have occurred, are usually sent to work again. 
MELANOSIS. 
By W. HAYCOCK, Veterinary Surgeon ( Member of the Veterinary 
College Edinburgh ), King Street, Huddersfield. 
MAY 5th, 1845, 1 was requested to give my opinion respecting a 
disease affecting a grey mare, belonging to a Mr. R. H., of Honley, 
near Huddersfield. 
History, 8$c . — The animal is now fifteen years of age,* three- 
parts bred, stands fifteen hands high. Formerly was much darker 
in colour ; but during the last three years the hair generally over 
the entire body has become much whiter. The animal has been 
in the hands of the owner twelve years, during which period she 
has never been affected with disease of any kind, until about four 
months ago, when a small tumour made its appearance immedi- 
ately over the articulation of the inferior maxilla, which tumour 
has so increased in size, that the owner is desirous, if possible, of 
having the animal relieved. I accordingly made a, careful exami- 
nation, and found a large tumour upon the left side of the head, 
together with a smaller one situated at the top of the neck on the 
same side. 
* That is at the time I was called to the case. 
