LARKSPUR POISONING OF LIVE STOCK. 29 
in order to be present at the times when larkspur poisoning was 
deemed most likely to occur. The location of the station was most 
favorable, not only because of the abundance of larkspurs in the 
immediate vicinity, but because it was located in the immediate 
neighborhood of the summer ranges of the cattle, so that a most 
intimate knowledge of range conditions could be gained. 
THE STATION AT GREYCLIFF, MONT. 
In 1912 and 1913 the field experimental work in poisonous plants 
was carried on at Greycliff, Mont. (PI. VII, fig. 2). An old sheep- 
shearing plant was loaned for the purpose by the owner, Ole Birke- 
larid, and the necessary repairs were provided by the Forest Service, 
including fitting up the house for use as office, laboratory, and dining 
hall, necessary repairs to the barn, and construction of fences and 
corrals. 
While experimental work was to be undertaken on a number of 
poisonous plants, this location was considered especially favorable 
for the study of the effects of feeding Delphinium cucullatum and 
Delphinium bicolor. The main industry in this region is sheep 
grazing, and it was considered an especially favorable point to study 
the effect of the Montana species of larkspur on sheep. Here, as in 
Colorado, the stockmen of the neighborhood showed most helpful 
interest in the work and assisted materially by loaning sheep and 
cattle for experimental work. 
- EXPERIMENTAL FEEDING OF DELPHINIUM BARBEYI TO CATTLE IN 1909. 
In 1909, 42 experiments were conducted of feeding Delphinium 
barbeyi to cattle on 26 different animals. Table I gives a sum- 
marized statement of these feeding experiments. The work was not 
commenced until the last of June and definite results were not ob- 
tained until the last of July. Of these 42 cases 22 were poisoned. 
As the season progressed it was evident that larger quantities of 
the plants were necessary to produce toxic effects than had been 
supposed at the beginning of the experiments, and this fact doubt- 
less explains the failure to produce poisoning in the earlier experi- 
ments. The summarized results in regard to symptoms and treat- 
ment are given later in this paper. Following are a few typical 
cases given in some detail. 
Case 92. 
This case was interesting as being the first one in which there 
were definite symptoms of poisoning. Case 92 was a cow weighing 
about 990 pounds which had been used for experimental purposes 
with Delphinium menziesii without any effect. On June 30 she 
ate 30 pounds of leaves and stems of Delphinium harbeyi. On the 
