Semper's Method

A method of making dry pn tions for exhibition or cla -room purposes, especially adapted for the preservation and exhibitioij of di ections. The animal, e. g.,:. It i hardened by chromic acid; after hardening, it moved and thoroughly washed in water. It is transferred from one to another of a series of alcohols, until it reaches 96 per cent, to per cent., the object being to remove all the water. From the strong alcohol it is transferred to spirit of turpentine, where it remains until thoroughly impregnated, after which it is simply dried in the air, when it will be found to have a soft kid-like texture, not easily broken. The various organs can now be painted suitable colors and the preparation labeled for use.