There is not space to trace the development of the railways in all the individual states. In all natural growths, increases at first are slow, then accelerated until a maximum is reached, followed by a gradual retardation. So with the railway growth. The number of miles of railroad constructed up to 1830 was 41; 1835, 918; to 1840, 2797; in small widely scattered locations, but from that time on to the Civil War the work went on rapidly. By 1860 about 31,000 miles had been constructed and was going on at the rate of 5000 miles per year. Seven trunk line roads had passed through the Appalachian Mountain system; at eight places they and their connections touched the Ohio River, and the Mississippi at ten.[99] By 1850 there was railway connection between Boston and the east end of Lake Erie, and from the west end of Lake Erie to Lake Michigan with steamboat connection across the two lakes; before 1860 there was a network of rails between the Atlantic seaboard and the Mississippi River. Construction lagged behind in the South. Up to 1856 the building was approximately as follows: Northeastern States 4000 miles Northern Central States 7500 „ South Atlantic States 2750 „ Southern Interior 2150 „ And the very fact that few of these were north and south roads, that travel and intercourse were east and west, that the people of the North did not fraternize with the people of the South, that they grew apart and worshiped at the shrine of different ideals, furnished at least one cause for the cruel Civil War. There are still too few north and south trunk lines of travel and commerce, too little trade and friendly intercourse to heal the differences engendered by a century of separation. There lies one of the hopes of the interchange of summer and winter automobile visitors. The building of railroads offered an opening for surplus capital; the opportunity for fortune and fame was attractive; but above all the people were crazed with the idea of improvement; every town wanted to grow bigger and a railroad was an absolute necessity; scores of companies were formed with the intention of beginning construction, then deeding the improvement to some established line to operate. Many communities subscribed stock, others voted bonds, others paid for right of way by private subscription in order to secure a railroad. Mob psychology had got in its work; the people were frenzied. The result was often overbuilding, parallel lines, too many roads attempting to occupy the same territory, with the result that branch lines often never paid interest on the cost of construction. On the other hand the gambling instinct was rampant, many roads were overcapitalized, stock was voted influential persons without money consideration, and stock sold to others for more than it was worth.