sold, and together make and keep a vow to steer clear of your traps ever afterwards. This is why you catch but one rat and no more; for a much more stupid and less nervous animal than a rat is would keep away from a similar arrangement in the future. We shall now try the experiment over again, but in a different fashion. Suppose we select a big round trap with falling doors at the sides and a hole on top. First be sure that the doors lift up and fall down very easily. If the bottom of the trap is of wire place it on sawdust, so that the rats are comfortable in it. Put the trap _away_ from the hole, near the wall of the cellar, if in winter near the warmest place, always in a dark spot. As our friend likes comfort so much, put a bag over the trap, so that he can find the falling doors easily. Get some rags scented with about fifteen drops of either oil of rhodium, oil of carraway, oil of aniseed, or a mixture of these oils. First tie a string around them and swab them around the rat-holes, then drag them on the ground near the wall, to the place where the rat-trap is and rub the rags well over it, then put them in. Have some nice tempting bait in the trap, either carrots, meat, broiled bacon, or cheese--anything fresh will do--but be careful to put in enough of it. If the trap is placed as we have above directed the rat will get in and not try to escape. _Make the trap as much unlike a trap and as much like a natural hiding-place as possible._ If this is done, it is highly probable you will have your cage chock-full of rats the next morning. It is very seldom this fails, but if it should not succeed the first night proceed as follows: Put the trap exactly as I have told you, with the exception to tie up the sliding doors. Let it stand there until the rats have eaten it out several times, replacing the bait. After the rats get used to frequent the place and think they have a "soft snap" on you, let down your falling doors again and you have them all!