59 
FOR BLOW-FLY PREVENTION 
THE “JETTING” METHOD 
Since 1916, when Mr. A. J. N. Gillespie, Manager of 
Orion Downs Station, Springsure, Q., published the results 
of his method of using Cooper's Powder Dip, hundreds of 
thousands of sheep in Australia have been successfully 
treated by the same method. Orion Downs, the property 
of Messrs. Wilson Bros., is one of the most noted wool- 
growing stations in Queensland, and the tests made with 
the “ Jetting " method were most thorough. Mr. Gillespie 
proved conclusively that the application of a strong 
solution of Cooper’s Powder Dip, by means of a solid jet, 
under pressure, not only cured fly-struck sheep, but pro- 
tected ет from further attacks for a considerable period. 
This method has reduced the losses from fly on Orion 
Downs by from до per cent. to 95 per cent., and the cost 
of treating sheep for fly by from 50 per cent. to 75 per cent. 
Writing on the subject, Mr. Gillespie sald :— 
“Since spraying, loss from flies has not reached т per 
cent. in the ewes during any year here. Idonot think 
the loss from Hiesis even 4% either in the ewes or rans.’ 
In 1913 we sprayed 18,000 ewes 
„ 1914 " 22,000 ,, 
» 1915 " 16,000 ,. 
„ 1916 9 -15,000 ,, 
and about 600 to 700 rams each year. 
“The strength of dip is essential. Dipping at this 
strength will kill the sheep, or cause the wool to shed, 
or spoil the wool.” 
“A fine spray is of no use, and in some cases danger- 
ous to the sheep. A hard, solid jet is alone effective,’ 
and is not in any way harmful, Never rub the dip in. 
Just spray hard with a solid jet under pressure.” 
“Four men can spray from 2,000 to 3,000, and even 
4,000 ewes per day. 1 would recommend spraying 
about 2,000 and doing them properly. If hurried, sheep 
are slummed and missed.” TE 
The word spraying is a misnomer. The dip is not 
applied as a spray, but by means of a solid jet. This is 
forced through а ġ in. nozzle under pressure ranging from 
60 to 120 Ibs. 
The correct strength of Coopers Powder Dip for 
“Jetting” is 4 pints of Powder to 1O gals. of water. 
