_Experiment No. 8._--On February 18, 1906, at 2 p.m., a rabbit whose temperature was 102.2°F. was fed with the aqueous extract of 125 grams of fresh _Astragalus mollissimus_, collected in September, 1905, and preserved in chloroform, 30 c.c. of the fluid being used. At 4.25 p.m. the temperature was 102.4°F. No symptoms were noted. This rabbit weighed 1,644.3 grams. On February 20 at 2.09 p.m. the temperature was 102.2°F. and the rabbit showed no symptoms. The same dose was repeated at 2.15 p.m. At 4 p.m. the temperature was 100.3°F. The rabbit was dull but could not be turned over without a struggle. February 21 at 1.30 p.m. the temperature was 101.4°F. The same amount of extract was fed at 1.45 p.m. At this time the animal was dull and breathed more rapidly. At 4.10 p.m. the temperature was 97.3°F. Next day the same amount of extract was again given at 2 p.m. At 2.16 p.m. the breathing became rapid and the animal duller. The ears were directed forward. At 4.15 p.m. the temperature was 101.6°F.; weight 1,757.7 grams; animal slightly dull. February 24, temperature 102°F., weight 1,786 grams. March 5, weight 1,729.3 grams. The animal was fed at 3.20 p.m. with a concentrated extract of 125 grams of _Astragalus mollissimus_, collected in September. Temperature at time of feeding 100.4°F.; 3.40 p.m., no symptoms; 4 p.m., temperature 102°F. March 7, weight 1,644.3 grams; March 8, weight 1,672.6 grams; March 10, weight 1,701 grams; March 12, weight 1,658.4 grams; March 14, weight 1,701 grams. In this case, where the same dose was given in a period of five days, very little effect on the rabbit was noted. _Experiment No. 9._--On March 1, 1906, a black rabbit weighing 2,664.8 grams was fed with a concentrated aqueous extract of 250 grams of fresh _Astragalus mollissimus_, collected in the fall of 1905.