This section is from the book "The Balance Of Nature And Modern Conditions Of Cultivation", by George Abbey. Also available from Amazon: The Balance Of Nature And Modern Conditions Of Cultivation.
Kent Field and Garden Mouse Trap (Fig. 91, N 0) is a very old contrivance. To form it, provide two bricks and a piece of wire about as stout as a knitting needle and 2 in. long. Place one brick on end (d) and the other flat (e) or even narrow face. Make a point of first placing the bricks in this way, thus indicating the exact distance at which one brick should be from the other when set up, so that when the brick falls it will be in the position represented, leaving no space for the mouse to escape, as it may if set up too close or too far back. Run the prop (f) through a bean or a pea, and place the wire thus baited in a slanting direction (i) for the slightest touch to move it, then down comes the brick (h). Take care in setting that the prop may not have all the weight of the brick, otherwise it will press so tightly to the other brick that it will not fall with the touch of a mouse. Where there is a wall, as indoors, only one brick is required. A handy man will set up a score of such traps in five minutes, and when baited with suitable substances they form first-rate sparrow or other bird traps.
Fig. 91. - Kent Field and Garden Mouse Trap.
N, adjusting on the ground: d, brick on end; e, brick on flat; f, piece of wire with broad bean bait; O, trap set: g, brick on end; h, fall brick; i, baited prop.