94 SHEKP. [1900 



whatever vague possibilities there may be of success, the points should 

 be considered, regarding which warning is given, in regard to the 

 various branches of application of this stringent treatment. The 

 operation is tedious, requires some skill, and should only be performed 

 by a veterinary surgeon ; also the ultimate results are not such as to 

 make the operation what can be generally advised ; and also the efifect 

 may be only temporary, as, even if the mai,'gots then present have 

 been satisfactorily removed, others may creep on and take their 

 places. 



For available and serviceable treatment "a practical means of 

 prevention consists in smearing the noses with a mixture of equal 

 parts of tar and grease, or of tar and fish oil, or of tar and whale oil. 

 The better way is to apply the preparation directly by a brush. Some 

 recommend smearing the salt and grain troughs with the mixture, ex- 

 pecting the sheep while feeding to get more or less on the nose. This 

 method is not thorough enough. Fish or whale oil alone is also 

 recommended." 



The following ointment is advised : — 



"Beeswax, one pound; linseed oil, one pint; carbolic acid, four 

 ounces. Melt the wax and oil together, adding two ounces of rosin 

 to give body, then, as it is cooling, stir in the carbolic acid. This 

 should be rubbed over the face and nose once in two or three days 

 during July and August. 



" All grubs seen on the ground should be crushed. Heads of 

 slaughtered sheep should be cared for so that mature grubs cannot 

 escape to the ground. Sheep-yards should be periodically cleaned and 

 sprinkled with lime." 



Those who wish to go into history and treatment of the attack in 

 detail will find information in Dr. Curtice's work, previously referred 

 to (pp. 25-34, with three plates) ; also in ' Treatise on Parasites and 

 Parasitic Diseases,' by Prof. L. G. Neumann, translated by Dr. Geo. 

 Fleming, pp. 568-573 ; in which publications will also be found 

 information on C(eniinis cerebraiis, of which the attack is sometimes 

 confused with that of (Estnis avis ; also in my ' Flies Injurious to 

 Stock ' I have given a short paper on the Sheep's Nostril Fly. 



