Pictures from Arizona

Clark telescope - used by Percival Lowell when he thought he could see the canals of Mars.
Note the car wheels used to rotate the dome and the wooden dome construction. The Clark Telescope is a 24-inch refractor purchased for $20,000 by Percival Lowell in 1896. It is 32' long and still housed in its original dome.

Here are pictures of the dome and telescope used by Clyde Tombaugh to discover Pluto in 1930. It is a 13-inch astrograph, installed at Lowell Observatory on Mars Hill in 1929.