(A. T.) The dressing for large wounds in trees is as follows: One bushel of fresh cow-dung is intimately mixed with half a bushel of lime rubbish, as from ceilings or walls, the same quantity of wood ashes, and one-sixteenth of a bushel of river sand, all finely sifted. The edges of the wound and surface being made perfectly smooth, the composition is laid on about one-eighth of an inch in thickness, care being taken to thin it off gradually at the edges. A powder of wood ashes, and one-sixth of the same quantity of burnt bones, is then applied, with a dredger, till the whole is covered, allowing it to remain half an hour to absorb the moisture. More powder is then rubbed on with the hand, till the whole acquires a dry, smooth surface. The composition is best applied in a liquid state, and may be made of the proper consistence by mixture with chamber lye, or soapsuds, and laid on with a brush. The surface will want occasional examination, to see that the plaster is not removed by the growth of the young bark.

The object is to apply some Tarnish or cement which shall not be so thick as- to impede growth at the edge, or shall not be of such an irritating nature as to affect the neighboring living tissues, but which shall effectually prevent the admission of moisture, and the growth of injurious fungi. For small outs use the dissolved shellac.

(Edward Aborn, South Seekonk, Mass.) We have submitted your four leading questions to the proper authorities in each, and are happy to supply you with answers that, on trial, will prove satisfactory: -