DIFFICULTY IN LOCATING DEFECTS.

A locomotive has so many parts that bear a close relation to each other, and that are so sympathetic when one of the parts becomes disordered, that it is sometimes a difficult matter to immediately locate a complaint. One of the signs of a defect, in many of the parts, or one of the consequences of it, is a “pound,”—a complaint that we hear of in a locomotive about as frequently, and with the same feeling, as we do of malaria in the individual.