In a wine bottle of cold water, dissolve two ounces acetate of lead (sugar of lead;) and then add two (fluid) ounces of strong nitric acid (aquafortis). Shake the mixture and it will be ready for use. - A very email quantity of the liquid, in its strongest form, should be used for cleansing all kinds of chamber utensils. For removing offensive odors clean cloths thoroughly moistened with the liquid, diluted with eight or ten parts of water, should be suspended at various parts of the room. In this case the offensive and deleterious gases are neutralized by chemical action. Fumigation in the usual way is only the sub-stitution of one odour for another. In in using the above, or any other disinfectant, let it never be forgotten that fresh air - and plenty of it, is cheaper and more effective than any other material.