64 THE INTERNAL PARASITES OE 



from head to tail ; but the male acquires only half that 

 length. As obtains with the other members of the family 

 (Strongylidce) the males have a kind of hood at the end 

 of the tail. Males and females alike infest the bronchi 

 of calves; their presence being productive of fatal 

 mischief by blocking up the air passages. 



A great deal has been written about husk, but what is 

 wanted is less recapitulation of well-known facts, and 

 greater knowledge of the causes which produce the 

 disease. Agriculturists are for ever demanding a remedy, 

 and the reply they obtain is practically to the effect that, 

 except in the earlier stages of the malady, remedies are 

 well nigh useless. One practitioner speaks highly of 

 turpentine, another of salt, a third of assafoetida, a 

 fourth of fumigations, and so on; each repeating year 

 after year the time-honoured experiences of his pre- 

 decessors. There can be no doubt as to the efficacy of 

 chlorine gas inhalations in young animals; and I have 

 the pleasure to remark that a former pupil of mine, Mr. 

 A. G. Leany, has recently employed this method of 

 treatment with great advantage in the case of fifteen 

 heifers. He had previously made a successful diagnosis 

 from the symptoms alone. 



Speaking of the lamb disease, a writer in the Gar- 

 dener's Chronicle asks, u Cannot some scientific person 

 think of a means of destroying these parasites by way 

 of an application to the pastures where the disease is 

 known to abound V } We reply to the effect that " any 

 application to the soil which shall be effectual in destroy- 

 ing the young parasites would prove injurious to the 

 herbage." What we require is a series of investigations 

 (by some competent person), which, in their results, shall 

 afford a clue to the proper preventive measures to be 



