290 on vegetable poisons. Dees tr. 
horse died in an hout after having swallowed its 
The tree here is therefore the same in every respect: 
as in other parts of the country, and proves equally 
“noxious to animals as elsewhere. How then comes 
it that they find it a wholesome winter food ? 
He next began to suspect he had been misinfor- 
med as to this fact; but upon inquiry he found also 
that he had not been here deceived. 
His next object was to inquire into the srs ‘of 
treatment of the animal when they administered that. 
food. In regard to this particular he was informed, 
that, at the beginning, great caution was required to 
give it only in small quantities, along with other food, 
and to be sparing of water; but that as the animals 
became habituated to it, lefs caution was necefsary ; 
and that they gradually augmented the quantity of 
yew, till it became the principal part of their food, 
though they never kept them on that food entirely 
by itself. 
From these particulars it occurred to our atten- 
tive investigator, that it was prebable the poisonous 
effects of this plant might be counteracted by the ef- 
fects of the other food that was taken along with it. 
- To ascertain this point the following experiment was 
‘made. y. 
Mr Wrborg by several preceding experiments had 
found, that eight ounces of frefh yew leaves, admi- © 
nistered by itself at one dose, was sufficient to kilk — 
any horse. He tried to give it in smaller quanti- 
ties by itself; but on account of the disagreeable 
taste of the leaves, he could not prevail upon the — 
horse he got for the purpose, even by long fasting, — 
