42 LECTURES. 



Here you see the superiority of a true worm- 

 poison over a drug which is probably only obnoxious 

 to the animal. Not only was the helminth dis- 

 lodged with the head intact, but it was effectually 

 killed, and in this instance the final moiety came 

 away without the patient's being aware of the fact 

 of its escape. The case is of further practical inte- 

 rest as showing the impropriety of timidly giving 

 only ten minim doses, when larger quantities of 

 the extract can be borne with impunity. It con- 

 firms the statements I have repeatedly made to you 

 respecting the time to be allowed for the full de- 

 velopment of the parasite ; it also shows the expe- 

 diency of employing the right remedy at the right 

 time, and it demonstrates the advantage you may 

 possess in knowing precisely the diagnostic cha- 

 racters of the parasite you have to deal with. A 

 haphazard method of treatment may occasionally 

 succeed ; but the more you know of the surround- 

 ings of any form of helminthiasis, the more will you 

 deserve the confidence reposed in you. 



