An intelligent contributor furnishes “The Boston Transcript” with the following account of an improvement which is soon to be introduced for public favor. He says :— '' To prevent the noise and din of omnibuses and other carriages on their way through the streets, has long been a great desideratum; and the public will be rejoiced to be informed that a mode to accomplish so important an object has at length been obtained. The improvement is said to have emanated from a practical engineer, and to be applicable to all sorts of vehicles for the common roads. By a proper arrangement and connection of the doors and windows, on the part of the manufacturer, the shaking and rattle generally so peculiar to them may readily be avoided.— But to get rid of the sound of the wheels, as they strike against the pavement, has hitherto been considered almost: an impossibility. This, we learn, may now be accomplished in the most simple and effective manner. All that is necessary is merely to cover the rims with india-rubber tires, of from an inch to an inch and a half in thickness, according to circumstances. At first it was thought that the india-rubber would lack strength and durability ; but, being expressly prepared lor the purpose, it is asserted that it will endure a long time."— [Exc. [We hwe seen the above in a great number of our exchanges within a few weeks. This invention was described in Vol. 3, Scientific American. The india rubber cannot wear as long as iron tires, but it may be an improvement to line between the felloes and tires with india-rubber.