sizes. These ovals are so arranged that the upper one throws its light to the lower one, down through the immense cylinder. Around each oval is built a series of fin protectors, which is the only part about the telescope I could not fully understand. They seemed to counteract the refraction of the water, and yet the water must be in the pipe to obtain proper results.
Imagine an astronomer at the base of this huge metallic structure, having at his finger's ends a dozen wire strings intricately connected with the oval system, and by the proper use of which he can increase or decrease the magnifying power of the ponderous telescope. The highest magnifying power of a telescope of this size is so great that the Milky Way is penetrated and its solar systems revealed. What an accomplishment it would be if a telescope of this magnitude could be mounted, a thing that these creatures never attempted to do. But they have built telescopes of various inclinations, all stationary. You can form an idea of the patience and endurance of these people when you learn that it re-
