=Operations against Woodchucks.=--Prof. F. H. Storer records in the Bulletin of the Bussey Institution, Harvard University, the results of his experiments in the destruction of woodchucks, which, besides being very injurious to lands he had under cultivation, appeared to be increasing. Smothering by a volatile liquid driven into the burrow has been suggested by Professor Hilgard, who recommends bisulphide of carbon. Professor Bussey finds that liquid not wholly satisfactory and liable to objections, and prefers a preparation of naphtha or other volatile liquid. In any event, some device seems to be needed for forcing a considerable quantity of the vapor into the very end of the burrow. Poisons are dangerous because of the probability that the animal would bring the food on which they are placed to the mouth of the burrow for eating, where children or useful animals might get it. While experimenting with burning Cayenne pepper or sulphur on touch paper, in order to smoke out the burrows, the author became acquainted with the "woodchuck torches" of Mr. B. M. Wedger, of Roslindale, Massachusetts. These consist of nitrate of soda, sulphur, mealed gunpowder, and sulphide of antimony, so packed into a tube like a Roman candle that on burning the fuse the vapors would be forced by great pressure to the farthest recesses of the burrow. They proved effectual, and it was indeed rare that any woodchuck to which they were applied ever reported himself again. Professor Storer also describes some experiments he made in burning sulphur in the burrows, with special expedients for insuring more rapid and perfect combustion of the sulphur; these promised fairly well. Mr. Henry Stewart has described in the Country Gentleman an effectual method of destroying woodchucks with blasting powder or dynamite.