Smut in Agriculture, a disease to which wheat is peculiarly liable, by which it becomes contaminated with a sooty looking powder, which sometimes destroys the whole substance of the grain. Many contrivances called smut-machines, have been at different times invented to cleanse wheat, before grinding, from this serious defect; but they have proved only partially successful in their operation, owing, we conceive, to the process simply consisting of violent agitation, which cannot be effective in removing the hollow damaged grain from the mass, although it may drive off much of the loose or external foulness.