420 
H. 0. YARROW. 
prove little besides the fact that the stone actually did adhere 
and became charged with blood. 
The first experiment was tried 
Jan. 4, 1888.—11:55 a. m. —Injected ten minims of glycerine 
venom mixed with ten minims of water into right leg of chicken, 
a ligature having been previously applied above point of puncture. 
A number of superficial incisions were then made in the vicinity 
of the wound, and the so-called mad stone applied with firm pres¬ 
sure. It held on for a number of minutes and then fell off, and 
there was a copious flow of blood following its detachment. The 
stone appeared saturated with blood and was placed in water and 
cleansed. The ligature was removed from the limb and the fowl 
liberated. 
Jan. 5—12 m. —The chicken is apparently very sick, with 
quickened respiration, is sluggish, crouches down and is averse to 
movement. In the vicinity of the injection there is much en¬ 
gorgement of the tissues. There is a copious flow of bloody 
serum from the wound. From this time up to January 9 the 
chicken gradually improved, and at this date appears entirely 
well. It walks around, eats well and the wound is cicatrized. It 
must be confessed that the result of this experiment was entirely 
unexpected, as it was supposed that the dose of venom given (10 
minims) would produce death in about thirty minutes. 
To verify the former test a second was tried. 
Jan. 13.—12:15 p. m. —Injected ten minims of venom and 
ten minims of water into left leg of chicken, no ligature being 
applied. Multiple superficial incisions were made in the vicinity 
of the puncture and a^'new piece of the stone was at once applied. 
It held on firmly for nearly fifteen minutes and absorbed consid¬ 
erable blood, falling off finally by its own weight. The chicken 
seemed to suffer little or no inconvenience from the operation, 
and walked about picking up corn. 
Jan. 16.—Is still doing well and the wound healing rapidly. 
Jan. 20.—Chicken in perfect health, wound cicatrized entirely. 
It should be mentioned that both these experiments were tried 
upon the same fowl, and it may be that the former inoculation 
with venom protected it from the second. Another experiment 
tried upon a fowl failed, the bird dying in about four hours. 
