604 Abstract Rqmt of Agricultural Discussions. 
miscliief might result. Another simpler and safer plan is to impreg- 
nate the atmosphere ^ith the fumes of sulphur, Mhich may be done 
by igniting a little pitch, tar, resin, or anything of that kind, and 
then throwing upon the burning mass a small quantity of sulphur from 
time to time. The fumes of sulphm- so thro\\Ti off will pervade the 
place in which the sheep are, and consequently be inhaled by them. 
No harm ever ensues from this where only ordinary care is used. 
Such, then, are the means we possess of giving relief in cases of this 
particular entozoic disease. 
He would next notice another parasite which does great mischief to 
lambs and sheep especially, owdng to its producing diarrhoea. There 
is one form of "scorn'" that is absolutely and directly due to the pre- 
sence of entozoa. These entozoa, however, are totally different from 
those we have been considering, and, strictly speaking, they are not 
filarise. The technical name it bears is Trichocephalus affinis, which 
signities a hair-headed worm, allied to the one met with in man. The 
worm as a rule, inhabits the larger intestines of the sheep, and is 
oviparous. The young are hatched directly from the ova, and con- 
sequently there are no transfoi-mations through which the worm passes. 
Like the woiins before alluded to they exist as perfect males and 
perfect females, and there is about the same proportion between the 
sexes. The young trichocephali may be hatched within the intestinal 
canal, or the ova may be cast out with the fasculent matter, and lie 
in the pastures, where, fortunately, thousands upon thousands of them 
perish ; but if only two eggs enter the organism and attain perfection 
as male and female, a gi'eat deal of injmy will be sure to follow. The 
ova are, indeed, fi-equently received ibto the digestive system of sheep 
through their food and drink, and there, finding warmth and moisture 
in their semi-pei-fect condition, the young worms quickly escape, and 
begin to develope within the intestinal canal. The trichocephali are 
so productive of mischief, from the circumstance that they insert their 
heads into the mucous membrane, and draw their nutriment, if not 
directly from the blood, yet from its immediate pabulum. When worms 
like these exist in large numbers, they must be productive of an im- 
mense amount of irritation, which leads to diarrhoea ; and as this form 
of diarrhoea will not yield to ordinaiy treatment, a great number of 
sheep are necessarily lost. These trichocephali appear to be as common 
as they are mischievous. Everybody knows that vicissitudes in the 
weather, a luxuriant growth of gimss, too large a quantity of gi-een food, 
turnips, and so on, will produce "scour;" but if no such causes as 
these are in operation, we may begin to suspect that any existing 
diarrhoea is attributable to trichocephali. Again, if upon a post-mortem 
examination of these wasted animals no filarias are detected in the 
bronchial tubes, it may readily be infeiTcd that the cause may be foimd 
in the presence of these worms in the intestinal canal. 
The means of getting rid of them are in principle, though not 
exactly in detail, the same as those already mentioned. A fair and 
free use of common salt will be cfi'ectual, and the more so because 
these worms are in the intestinal canal, where salt can be brought to 
bear directly upon them. Sulphate of iron can also be brought to 
