254 



POISONING. 



western half of the United States, all of which are undoubtedly poisonous j 

 if eaten even in moderate quantity. j 



TOBACCO POISONING. 



Tobacco poisoning may be produced by baths or lotions containing 

 tobacco juice, which is often used as a parasiticide. The ingestion of 



tobacco leaves in forage may also 

 produce poisoning. Doses of 1 ounce 

 in the goat and 10 ounces in the ox 

 are toxic. 



The symptoms consist in sali- 

 vation, vomiting, nausea, diarrhoea, 

 cardiac palpitation and dyspnoea. 



The lesions are those of gastro- 

 enteritis with cerebral congestion. 



Treatment consists in giving 

 tannin, black coffee, etc. 



Solanum dulcamara.— The 



bittersweet, or climbing night- 

 shade, is a European weed, now 

 introduced in the north - eastern 

 quarter of the United States. The 

 leaves are suspected of being poi- 

 sonous to stock. 



* Solanum nigrum. — The black 

 nightshade (common nightshade;* 

 garden nightshade) is a common 

 weed in cultivated fields throughout 

 the greater portion of the United 

 States. Cattle seldom eat the plant, 

 but a few cases of poisoning are 

 recorded for calves, sheep, goats, 

 and swine. 

 * Solanum triflorum. — The spreading nightshade is a native of the 

 Great Plains (United States), and also a common garden weed from 

 Arizona and Texas to British America. Complaints of the poisoning 

 of cattle by this plant have been" sent to the Department of Agriculture 

 from Nebraska. Experiments show that the berries are poisonous. 



Solanum tuberosum. — The small, immature tubers of the common 

 cultivated potato and those that have turned green from exposure to 

 the sun are slightly poisonous. The green fruit and the white sprouts 



Fig. 112. — Spreading nightshade (Sola- 

 nii,m triflorum), one-third natural size. 



