PARASITIC DISEASE OF THE LUNGS. 807 



advanced so far that immediate suffocation becomes inevitable ; 

 or it may be resorted to when other methods have failed. In the 

 most far-gone cases, instant relief will follow this operation, since 

 the trachea may with certainty be cleared of all obstructions. 



" Lastly. The most essential thing to be observed, in view of 

 putting a check upon the future prevalence of the disease, is the 

 total destruction of the i^arasites after their removal." 



Intra-tracheal injections for hoose in calves. — Recent experi- 

 ments have demonstrated that drugs may be injected into the 

 trachea with impunity, and that hoose may be most advan- 

 tageously treated with remedies administered by this method. 

 Turpentine, prussic acid, carbolic acid, and creosote may be used 

 in this way. The turpentine and creosote should be mixed with 

 either oil, or an emulsion of oil, water, and alkali, as in the 

 following : — R 01. tereb., 3ij. ; ol. olivae, 3j. ; potasste carb., gr. xx. ; 

 aquffi, 3j. Inject this quantity daily for three days. The injections 

 are given with the hypodermic syringe. Make a small incision 

 through the skin at the site for tracheotomy, pass the needle of 

 the syringe into the trachea between two of the rings, and inject. 



Corrosive sublimate, one of the most powerful parasiticides 

 known, might be tried in the form of intra-tracheal injection — 

 gr. ^ to gr. i in 3iij. or 3iv. of water. 



PAKASlTic GASTEic CATARRH. — {Gastrorrhcea Parasitica.) 



A disease of the fourth stomach of the sheep, caused by the 

 presence of the nematode worm called the Strongylus contortus. 



The following is a short history of an outbreak of disease in 

 sheep induced by this parasite, and to which my attention was 

 called by Mr. Connochie, V.S., Selkirk, in March of this year, 1884. 



It appears that the owner of the sheep in question had placed his 

 lambs, after weaning time, upon a very luxuriant pasture, but from 

 the nature of the autumn of 1883, which was very wet, the grass 

 became rank and the soil damp, notwithstanding it had been 

 previously well drained both on the surface and underground. 



After thriving well for some time, they began to lose flesh 

 very rapidly, and gave other indications of disease ; they were 

 then removed to another pasture of good clean grass, and shortly 

 afterwards placed on turnips, oats, and Indian corn. This change 

 seemed to have the desired effect, as they commenced to thrive 

 and lay on flesh ; but in the month of February 1884, when 

 nearly fat and fit for the butcher, the now hoggets suddenly 



