Testing Horse' Feet. J. C. Henry, of San Diego, Cal., through the columns of The Scientific American, suggests a novel means of testing the condition of horses' feet. Take a battery bat-tery or magnetic machine, one that gives a light current, say such as can only be felt with moist hands. Attach one terminal ter-minal to the animal's bit, the other to the shoe. If the horso suffers from the shoe or nails, he will 6quirm under the test. If there be no irritation, he will pay no attention to it. A little electrical science in the blacksmith shops would locate much suffering. True Flae.