Address by Hon. Wm. J. McAlpine before the Chamber of Commerce, at the Cooper Union : on the extent of the products of the food-producing interior of the United States: the channels of transport to market : their relative capacity and economy : what improvements or new routes may be made to increase and cheapen transport, and how these may be made conducive to the interests of the merchants and citizens of New York City, May 8th, 1873.