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it is wholly unnecessary to enter on it here, more especially as I 
am quite unqualified to offer an opinion on this part of the treat¬ 
ment. But, looking at the matter from an entomological point of 
view, as to the known power of kerosine emulsion as a most 
serviceable insecticide, I may perhaps be allowed to give the formula 
for kerosine emulsion quoted by Dr. Curtice, in his work mentioned 
above, from the ‘American Agriculturist,’ October, 1889, p. 490, as 
one amongst various desirable applications:—“ Churn fresh-skimmed 
milk and kerosine together in the proportion of one gallon of milk 
to two gallons of kerosine, either in a churn, or by using a force- 
pump, until an emulsion is made. The method of using the 
force-pump is to set it in the vessel containing the mixture, and 
turn the stream back into the same vessel. The emulsion will 
form quicker if boiling hot milk is used. For dipping, use one 
gallon for each ten gallons of water required.” 
The reader will please observe that I do not recommend the 
above on my own responsibility, only as being given on good 
authority, and, in case it is not injurious to sheep or wool, I should 
think it was very likely to do good as an insecticide. Probably 
paraffin oil would do just as well as kerosine. 
The methods of prevention are obviously based on the habits of 
the pest, as, for instance, keeping animals known to be infested, or 
newly purchased sheep not certainly known to be clear, away from 
the flock until they have been dipped; care not to let sheep after 
being dipped be turned again into the former pastures or pens until 
a week has elapsed, by which time it may be considered that all 
flies harbouring on the ground will have died; also not allowing 
shorn wool to be stored where Ticks, or young Ticks hatching out 
of the pupa-cases, can crawl out to sheep in the neighbourhood. 
This attack is not as disturbing to the sheep as that of the very 
nearly allied Forest Fly attack is to horses, because the “ Sheep 
Ticks,” being wingless, the animals have not the terror to bear 
which is caused by the sudden descent of the Horse Forest Fly. 
Also the “ Ticks ” have not the power of very rapid movement in 
every direction possessed by the allied pest. 
Still, from irritation and to some degree of loss of blood, it is, 
where prevalent, bad—sometimes very bad—for the sheep, and, as it 
can easily be transferred from one sheep to another, it is very 
desirable to get rid of the infestation as soon as possible. 
