Phosphoesterases of bone and snake venoms

IN the course of experiments on the constitution of substances containing organically combined phosphorus in the form of phosphoric esters, it became necessary to obtain preparations of some of the different types of phosphoesterases Although many investigators have described the phosphoesterases obtained from a large and varied number of animal and vegetable tissues, it is believed that the present communication records hitherto untried sources which should be of value in this field.