140 POISONS. 



mis cotala) has sometimes, like the yew, caused vio- 

 lent illness and death. This is seldom eaten when 

 found green in the field ; but when mingling in its 

 dried state with the hay, it has produced mischief. 

 The animal in this case should be drenched with the 

 gruel and vinegar; and if costiveness follows, sixteen 

 or twenty ounces of linseed oil, guarded by half a 

 drachm of chloroform, should be given every six 

 hours, until the symptoms improve. 



The Water Parsley has sometimes produced palsy ; 

 and the Water Dropwort has poisoned the horses that 

 have eaten it. When this occurs the animal should 

 be treated as in the previous case. 



If horses are destroyed by the mineral poisons, it 

 is generally to be attributed either to design or un- 

 skilful treatment. All of the mineral poisons, in cer- 

 tain doses, are useful in many diseases ; in fact, they 

 sometimes constitute almost the only means of cure : 

 but the dose being too large, or the use of the drug 

 too long persisted in, the animal may be destroyed 

 instead of the disease. 



It is fortunate for the horse that Arsenic is not 

 frequently resorted to, as an internal medicine. It 

 was always a dangerous tonic, and especially after 

 acute disease. In cases of worms it has been given 

 with fatal effect. It may be used with less danger as 

 an external application : but it has occasionally done 

 mischief even here, and there are many safer and 

 better caustics. 



The symptoms of poisoning by arsenic fire — the 

 evident expressions of intense pain ; the presence of 

 excessive thirst; the eager gaze at the flanks; the 



