The next subject is, The Curious Formation of the Eye. - The Eye infinitely surpasses all the works of man's industry. Its structure is one of the most wonderful things the human understanding can become acquainted with; the most skilful artist cannot devise any machine of this kind which is not infinitely inferior to the eye; whatever ability, industry, and attention he may devote to it, he will not be able to produce a work that does not abound with the imperfections incident to the works of men. It is true, we cannot perfectly become acquainted with all the art the Divine Wisdom has displayed in the structure of this beautiful organ; but the little that we know suffices to convince us of the admirable intelligence, goodness, and power of the Creator. In the first place, how fine is the disposition of the exterior parts of the eye, how admirably it is defended ! Placed in durable orbits of bone, at a certain depth in the skull, they cannot easily suffer any injury ; the over-arching eye-brows contribute much to the beauty and preservation of this exquisite organ; and the eye-lids more immediately shelter it from the glare of light, and other things which might be prejudicial: inserted in these are the eye-lashes, which also much contribute to the above effect, and also prevent small particles of dust, and other substances, striking against the eye.* The internal structure is still more admirable. The globe of the eye is composed of tunics, humours, muscles, and vessels, the coats are the cornea, or exterior membrane, which is transparent anteriorly, and opake posteriorly; the charoid, which is extremely vascular; the uvea, with the iris, which being of various colours, gives the appearance of differently coloured eyes ; and being perforated, with the power of contraction and dilatation, forms the pupil; and, lastly, the retina, being a fine expansion of the optic nerve, upon it the impressions of objects are made. The humours are the aqueous, lying in the forepart of the globe, immediately under the cornea; it is thin, liquid, and transparent; the crys-talline, which lies next to the aqueous, behind the uvea, opposite to the pupil, it is the least of the humours, of great solidity, and on both sides convex ; the vitreous, resembling the white of an egg, fills all the hind part of the cavity of the globe, and gives the spherical figure to the eye. The muscles of the eye are six, and by the excellence of their arrangement it is enabled to move in all directions. Vision is performed by the rays of light falling on the pellucid and convex cornea of the eye, by the density and convexity of which they are united into a focus, which passes the aqueous humours, and pupil of the eye, to be more condensed by the crystalline lens. The rays of light thus concentrated, penetrate the vitreous humour, and stimulate the retina upon which the images of objects, painted in an inverse direction, are represented to the mind through the medium of the optic nerves.

* Besides these, amongst the internal parts are enumerated, - the lachrymal gland, which secretes the tears; the lachrymal caruncle, a small fleshy substance at the inner angle of the eye; the puncta lachry-malia, two small openings on the nasal extremity of each eye-lash; the lachrymal duct, formed by the union of the ducts leading from the puncta lachrymalia, and conveying the tears into the nose; the lachrymal sac, a dilatation of the lachrymal canal

------------------------The visual orbs

Remark, how aptly station'd for their task;

Rais'd to in' imperial head's high citadel,

A wide extended prospect to command.

See the arch'd outworks of impending lids,

With hairs, as palisadoes fenc'd around

To ward annoyance from without. Bally.

Again :Who form'd the curious organ of the eye,

And cloth'd it with its various tunicles,

Of texture exquisite ; with crystal juice

Supply'd it, to transmit the rays of light;

Then plac'd it in its station eminent,

Well fenc'd and guarded, as a centinel

To watch abroad, and needful caution give? Needler.