It has a fine modern building, with all the best appliances, in which experiments are carried on with all kinds of serpents, living and dead, with the object of discovering all the properties of their several kinds of venom, and of developing various anti-venom serums which nullify the effects of the different venoms.

The treatment consists in injecting into the arm a preventative serum.

Moreover, even between these two allied genera of pit-vipers, the differences in the action of the poison are sufficiently marked to be easily recognizable, and to render the most effective anti-venomous serum for each slightly different from the other.

The method of securing and testing serum of patient was described (titration, a colorimetric method of measuring the percentage of substances in solution), and the test by litmus paper of normal or super-normal solution.