"Another inventor, J. B. McComber, representing the Chicago-Tower Spiral-Spring Ascension and Toboggan Transportation Company, proposed a tower with a height of 8,947 feet, nearly nine times the height of the Eiffel Tower, with a base one thousand feet in diameter sunk two thousand feet into the earth. Elevated rails would lead from the top of the tower all the way to New York, Boston, Baltimore, and other cities. Visitors ready to conclude their visit to the fair and daring enough to ride elevators to the top would then toboggan all the way back home. "As the cost of the tower and its slides is of secondary importance," McComber noted, "I do not mention it here, but will furnish figures upon application." A third proposal demanded even more courage from visitors. This inventor, who gave his initials as R. T. E., envisioned a tower four thousand feet tall from which he proposed to hang a two-thousand-foot cable of "best rubber." Attached at the bottom end of this cable would be a car seating two hundred people. The car and its passengers would be shoved off a platform and fall without restraint to the end of the cable, where the car would snap back upward and continue bouncing until it came to a stop. The engineer urged that as a precaution the ground "be covered with eight feet of feather bedding."