I have sometimes observed differences in individuals of the same species; the intermission sometimes is wanting; some lie in one long continuous spasm, with scarcely any intermission, but that is uncommon. I have generally found that the animal is in a state of flaccidity about the period of the termination of life. I have always observed an interval before the rigidity that takes place after death. There is a cessation of the symptoms immediately before death; the rigidity is gone, the body is flaccid. The rigidity is renewed very soon after death. I have frequently opened the bodies of the animals that have thus been killed. I never could find that the poison had produced any apparent effect upon the stomach or intestines. I have never found any apparent effect on the spinal cord or brain which I could trace satisfactorily to the poison. I have always found that the heart of the animal after death contained blood. Others have found it devoid of blood, but I have not. In the one case of the human subject which I saw the symptoms were the fixing of the jaw, spasmodic retraction of the head, slight grinning expression of the mouth, and a slight stiffness of the arms and legs. There was no convulsion of the muscles of the trunk, nor any convulsive movement of the arms and legs in that case. I have collected all the cases that have occurred up to the time of the publication of my book as far as I am aware. The poison appears to require a longer time in producing its effect in the larger animals than the small. In the case of the wild boar, the poison was injected into the chest. The animal died in ten minutes, from the third of a grain. I think there are cases where strychnia, given to the human subject in the shape of nux vomica, has not operated for about an hour. Strychnia itself is generally given in the solid form, sometimes in the fluid form. When given in the fluid form the symptoms are not so long in appearing as when given in the solid form. When given in the shape of a pill the time it takes to act depends very much upon the material used for making the pill. To make the appearance of the symptoms as late as possible the poison might be mixed up with resinous materials, which are all difficult of digestion. Such materials would be within the knowledge and reach of a medical man, and some are often used for making ordinary pills. Absorption would not begin until the pill came to be broken up or digested; the less soluble the pill the longer would be the period required.