Within the last few years a most extraordinary amount of mechanical ingenuity has been brought to bear upon the construction of small automatic toys, which are sold in the streets for a few pence, and I think, even more than the extraordinarily simple and ingenious contrivances by which the various effects are produced, the great inventive merit consists in a design and method of manufacture by which they can be turned out, with a profit, at so insignificant a cost. I have brought together a few examples, a very minute fraction of the hundreds of forms that exist, but selected merely to illustrate the different types of principle of action. A very favourite motive power is a wound up spring, consisting of strands of vulcanized india-rubber, and here I have one of the well-known butterflies which come out in Paris in 1878, where they filled the air of the Avenue de l’Opera, the shops of which were then occupied chiefly by hawkers of toys. The motive power of this toy is nothing more than a light screw propeller or fan rotated by the untwisting of a spring, while on the body of the machine are two fixed wings or fins to prevent the whole machine from rotating. The action is wonderfully like that of an animal, perhaps most like that of a bat. Here again the same principle is applied in a running mouse, and this is especially interesting from the fact that the machine winds itself up the moment the tension of the cord is relaxed, and as the spindle of the wheels is the flexible rubber itself the peculiar scuttling action of a mouse is well imitated. There is again a large class of mechanical toys in which there is a combination of a rubber spring with a wheel and escapement, the pallets of which by their reciprocating motion producing whatever effect may be desired; the swimming fish is one of them, the wagging of the tail being produced in the way I have described. Here is another displaying considerable ingenuity. In this case an escapement wheel works a crutch which by a pair of cranks linked together causes each of two pugilists to turn a little way backwards and forwards on one heel, and the arms being hung loosely to the shoulders by rubber hinges give to the figures the appearance of hitting out vigorously. I have here a couple of figures which I admit do not contain their motive power within themselves but they require so little aid from outside and do so much for themselves that I have been tempted to bring them in. Here is a monkey climbing a rope, and its progression is insured by the simplest possible device, the string passes over one pin and under another in his posterior hands while the anterior pair of hands grip the rope with a slight degree of friction: if the string be tightened the lower hands act as a lever which pushes the body up, but when it is slack it slips round the pins and does no work, in other words the grip of the hands is greater than that of the feet when the cord is slack but less when it is tight.