The Practical Astronomer: Comprising illustrations of light and colours--practical descriptions of all kinds of telescopes--the use of the equatorial-transit--circular, and other astronomical instruments, a particular account of the Earl of Rosse's large telescopes, and other topics connected with astronomyDick, Thomas
Science
The Practical Astronomer: Comprising illustrations of light and colours--practical descriptions of all kinds of telescopes--the use of the equatorial-transit--circular, and other astronomical instruments, a particular account of the Earl of Rosse's large telescopes, and other topics connected with astronomy
Dick, Thomas
Astronomical instruments; Astronomy; Telescopes
The eye is the instrument by which we perceive the beautiful and
multifarious effects of this universal agent. Its delicate and
complicated structure, its diversified muscles, its coats and
membranes, its different humours possessed of different refractive
powers, and the various contrivances for performing and regulating
its external and internal motions, so as to accomplish the ends
intended--clearly demonstrate this organ to be a master-piece of
Divine mechanism--the workmanship of Him whose intelligence surpasses
conception, and whose Wisdom is unsearchable. ‘Our sight (says Addison)
is the most perfect and delightful of all our senses. It fills the
mind with the largest variety of ideas, converses with its objects at
the greatest distance, and continues the longest in action, without
being tired or satiated with its proper enjoyments. The sense of
feeling can indeed give us a notion of extension, shape, and all other
ideas that enter the eye, except colours; but at the same time it is
very much strained, and confined in its operation to the number, bulk
and distance of its particular objects. Our sight seems designed to
supply all these defects, and may be considered as a more delicate and
diffusive kind of touch that spreads itself over an infinite multitude
of bodies, comprehends the largest figures, and brings into our reach
some of the more remote parts of the universe.’
Could we suppose an order of beings endued with every human faculty but
that of sight, it would appear incredible to such beings--accustomed
only to the slow information of touch--that by the addition of an
organ consisting of a ball and socket, of an inch diameter, they might
be enabled, in an instant of time, without changing their place, to
perceive the disposition of a whole army, the order of a battle, the
figure of a magnificent palace, or all the variety of a landscape. If
a man were by feeling to find out the figure of the Peak of Teneriffe,
or even of St. Peter’s church at Rome, it would be the work of a
lifetime. It would appear still more incredible to such beings as we
have supposed, if they were informed of the discoveries which may
be made by this little organ in things far beyond the reach of any
other sense--that, by means of it we can find our way in the pathless
ocean--that we can traverse the globe of the earth, determine its
figure and dimensions, and delineate every region of it--yea, that we
can measure the planetary orbs, and make discoveries in the sphere of
the fixed stars. And, if they were farther informed that, by means of
this same organ, we can perceive the tempers and dispositions, the
passions and affections of our fellow-creatures, even when they want
most to conceal them--that when the tongue is taught most artfully to
lie and dissemble, the hypocrisy should appear in the countenance to a
discerning eye--and that by this organ we can often perceive what is
straight and what is crooked in the mind as well as in the body--would
Public-domain text, read in full here on John Shaqi.
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