Buggy

Small wagon used in coal-mines for carrying coal short distances. in color, strong, and cheap. The most porous stones are the least durable, as they absorb water and are liable to become disintegrated by frost. It is best that stones should be laid on their "quarry beds," that is, in the same position as in the quarry. Granite is the strongest, but it is liable to crack under the action of fire. The best test of stone is its durability under conditions of actual service.