Where the common jar without a stopper is used, great care will be required in closing up, to prevent loss by evaporation. There should first be prepared a circular plate of thick sheet lead, to rest on the top of the neck of the jar. The specimen having been suspended by a string, carried through by a large needle, and at two different points, is to be fastened to the disk of lead by means of two holes, punched by an awl, about half an inch apart, near the centre. The portion of string above the lead, with the holes also, should now be carefully covered with sealing-wax, otherwise, by capillary attraction, the alcohol will keep the bladder covering continually wet, and finally rot it out. Over the lead is now to be stretched a piece of moistened bladder, and wound with twine around the neck of the jar. When dry, this is to be covered with a coat of black varnish; this again when dry, being followed by a second layer of bladder and varnish. Wet preparations should be kept where they may have a free exposure to sunlight. If placed in a dark closet, they become damaged in texture, and acquire a dark and unpleasant color; this is particularly the case with the ligamentous and nervous tissues. Dr. Brunetti of Padua, who has invented a new process for preserving certain kinds of specimen, and who received a gold medal some years ago at the Paris Exposition, gives the following particulars of his method: “The process comprises four several operations, viz.: 1, the washing of the piece to be preserved; 2, the _degraissage_, or eating away of the fatty matter; 3, the tanning, and 4, the desiccation. “1. To wash the piece M. Brunetti passes a current of pure water through the blood-vessels and the various excretory canals, and then he washes the water out by a current of alcohol. “2. For destroying the fat he follows the alcohol with ether, which he pushes, of course, through the same blood-vessels and excretory ducts; this part of the operation lasts some hours. The ether penetrates the interstices of the flesh and dissolves all the fat. The piece, at this point of the process, may be preserved any length of time desired, plunging it in ether, before proceeding to the final operations. “3. For the tanning process M. Brunetti dissolves tannin in boiling distilled water, and then, after washing the ether out of the vessels with distilled water, he throws this solution in.