"_A Screw._"--Why should a broken-down horse be called "a screw?" Is it
because he has "a screw loose," or because a force equivalent to the
screw-propeller must be applied to make him go? This was discussed at a
hunting dinner the other evening, and the guests could arrive at no
satisfactory conclusion: neither could they agree as to the definite
meaning that should be assigned to "screw," and what description of horse
came under that very condemnatory designation. Perhaps "N. & Q." can assist
them to a proper meaning.