Fig. 51.
Fig. 52.
The appended sketches ([Figs. 51] and [52)] show the apparatus. I give a minute description of it here, as it is only in very large towns that the article is procurable, made in the manner it should be, so the conjuror can either get a cabinet maker to make him one, or, if he be anything of a carpenter, make one for himself.
A ([Fig. 51]) is a lightly-made drawer, without any back end, and fits somewhat easily into F ([Fig. 52]), which should be made of 3/8in. stuff, and strongly put together. B is another lightly-made drawer, smaller than A, into which it fits. A has a narrow combing all round the upper surface of the front end and sides. This serves to conceal the presence of B, which in reality looks like the inside of A. To perfect this deception, the open sides of A are, as depicted in sketch, made with mortises, and the end of B being allowed to extend a little each side, and also mortised, the two dovetail one into the other, and present a most innocent appearance. The knob D is not fixed, but has a slight perpendicular play. It is connected with a piece of flat metal, which extends from the knob to the upper portion of the wood, inside the combing, where it is furnished with a catch, which can be made by turning over the end of the metal and sharpening it a little. In B there is a slight incision made at C. When B is pushed home into A, and the knob D pressed downwards, the catch fixes itself into C, and thus keeps the two drawers firmly together. The action of shifting the knob up and down is very slight indeed, a 1/4in., or, at the outside, 1/3in. play being ample. When the two drawers are thus fixed, they may be shown round, and no one not in the secret will suspect that there is more than one drawer. The more care and attention that is paid in fitting the drawers nicely together, the better.
At the lower part of the back end of B will be noticed a protruding piece of wood, E. This fits closely against A when the two are closed together, but it plays an important part in the working of the box. In the body, F ([Fig. 52]), is cut a square hole, immediately under the point where the thumb is seen to be pressing. G is a flat spring let into the bottom of F, and fixed at the end farthest removed from the square hole. A square piece of wood, the same thickness as the bottom of the body F, and slightly smaller than the hole, is glued firmly on the free end of the spring, so that it is always in the hole. The exterior of the box should be painted or French polished, and the bottom covered with baize or cloth. The material should be glued on, the space covering the spring, and half an inch all round it, being left free. The apparatus is then ready for use, and is thus "worked": We will suppose that it is required to cause several apples to disappear. The drawer A, with B inside it, and the knob pressed firmly down, is shown in one hand, and the body F in the other. The apples are then put into A (really into B), which is then pushed into F. After the performer has pretended to extract the apples by magical means, he takes up the box with both hands, one hand grasping one end, with the thumb on the spring G ([Fig. 52]), and the other hand seizing the knob D, which it presses upwards, thus removing the catch from the slit C. With the thumb pressing as hard as possible on the spring, the drawer A is pulled out. The square piece of wood on the end of the spring G, being pressed inside the box, causes an obstruction to the inner drawer B through the medium of the protrusion E, and B is consequently held back in F. The drawer A, which is, after all, merely an outer shell, is shown instead, and the audience, not knowing of the existence of a double drawer, imagine that the one shown them is the one which they saw filled with apples. When the box is opened, it should be held sideways, with the top turned towards the audience, and when it contains such articles as apples, which easily shift in a very audible manner, it should be placed in this position on the table, before the contents are made to disappear. It would be stupid to pull out an empty drawer and then cause a rumbling to be heard. The audience would at once divine that the articles were kept back in the body of the box by some means.
When the box is made so large that the hand cannot grasp it in the manner shown at [Fig. 52], the closed end should be furnished with a knob matching that on the drawer A. This can then be held by the fingers, and so enable the thumb to find a purchase.