The best lubricant to use on the perch bolt and felloe pieces when putting together the under-carriage of a victoria is mule by melting some tallow, then mixing with it sufficient axle oil so that it will be quite soft when cold, and about two small packets of powdered blacklead to 111), of tallow and oil. The under-carriage, if the vehicle is in constant use, should be taken out each time the trap is oiled, which is about every three months.