That the following description of these telescopes is given by Mr.
Holcomb:
The two reflecting telescopes now submitted by the subscriber,
are constructed on the plan of Sir William Herschel, having
the front view. The largest has a focal length of 9½ feet;
the diameter of the speculum is 8½ inches, and has five
astronomical eye-pieces, and one terrestrial eye-piece, for
showing objects erect; the lowest power is 57, the highest
900. The smallest has a focal length of 7 feet 9 inches; the
diameter of the speculum is 6½ inches, and has one terrestrial,
and four astronomical, eye-pieces; the lowest power is 60, the
highest is 600. They are of the same kind as those that were
submitted a year ago, except the manner of mounting, which is
very different.