Optical principles for landscape gardening

LANDSCAPE GARDENING being connected with optics or vision, or rather with the application of their rules to practical improvement, it may not be improper to devote a chapter to the following observations. There is a certain point of distance from whence every object appears at its greatest magnitude. This subject was originally discussed, in consequence of observing that a particular rock at PORT ELIOT appeared higher or lower, at different distances. The inquiry into the cause of this difference led me to propose a question to several ingenious friends.