No More Learning

The
original improvers of telescopes would probably think, that as long as
the size of the specula and the length of the tubes could be increased,
the powers and advantages of the instrument would increase; but
experience has since taught us, that the smallness of the field, the
deficiency of light, and the           of the atmosphere being
magnified, prevent the beneficial results that were to be expected from
telescopes of extraordinary size and power.