A candidate for Congress from a certain Western state was never shy about telling the voters why they should send him to Washington. "I am a practical farmer," he said, boastfully, at one meeting. "I can plow, reap, milk cows, shoe a horse--in fact, I should like you to tell me one thing about a farm which I can not do." Then, in the impressive silence, a voice asked from the back of the hall: "Can you lay an egg?"