The White City Program refers to a ride that it calles The Holland Slide.  However, it appears that it was also called The Dragon Slide because the slide was decorated to look like a dragon wrapped around the tower with the head at the bottom.

The Guide says this of the ride:

This riding device is an adult improvement on the ancient and pleasurable sport of childhood known as " sliding down the bannisters" and perhaps has been indulged in by every person who lived in a house that contained a stairway with a balustrade.

In the improvement offered here under the name of the " Holland Slide " the same sensations given to the child in his sport is felt by the adult, only with an intensified quality that makes it more to the taste of the " grown up, ' and yet robs it of none of its delights to the youthful seeker after some of the pleasures of swift and safe motion. The twisting and turning around the old Dutch Mill as the slide is made causes the ride to seem much longer than it really is, and makes it much longer than it appears to be.

This may seem a paradoxical statement, but it is not. It all depends on the point of view. The height of the tower is about sixty feet but the actual ride in circling it several times in making the descent is more than four times the perpendicular measurenuent. Taking the other view point, the actual ride being over two hundred feet, the rider in making the descent, even at the rapid speed in which it is made, imagines that he has in reality travelled more than three times the actual distance. A simple method of proving that the statement above is not a paradox is to try the ride. Beyond the proof thus obtained the rider will find a healthy pleasure that will more than repay him for making a personal investigation.

(excerpt from the 1909 program)