File:Cosmic law; the immortality of the soul and the existence of God (1916) (14598336668).jpg

Identifier: cosmiclawimmorta00hill (find matches)
Title: Cosmic law; the immortality of the soul and the existence of God
Year: 1916 (1910s)
Authors: Hill, Lysander, 1834-1914
Subjects:
Publisher: Chicago, Sterling Publishing Company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ngle eyes con-structed in the form of elongated tubes closed at their frontend and set into the compound eye like pins in a hemispher-ical pin-cushion. The heads, or closed ends, of the little tubescontact with each other on every side so as to form the con-tinuous visual surface of the compound eye, which is nowseen not to be regularly curved, but composed of almost in-finitesimal facets resembling the facets of a cut diamond.Each transparent facet closes the front end of one of the THE EYE 79 tubes and acts as a lens to direct the ray of light to a nervefibril which extends from the inner end of the tube to theinsects brain. Thus each facet, tube, and nerve-fibril to-gether constitute a separate single eye, provided with an opticnerve, and ready for business. The Austrian naturalist, Ex-ner, has recently demonstrated that what each single eye seesis a separate portion of the field, and that these separate por-tions contact together to make up the whole field seen by thecompound eye.
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Pig. 4. Section through the eye of a dragon-fly. The stem at the bottomof the Fig. is the optic nerve, consisting of a fibril from each lens. This is a strange and exceedingly complicated but effec-tive contrivance for the purposes of the little insect. It ap-parently has no means of focal adjustment; but the creatureprobably needs none. The bulging compound eye sees clearlyin almost every direction; as an attempt to catch its ownerwill readily prove. The two compound eyes are undoubtedlycoordinated to act together without confusion of vision. It is inconceivable that such an organ could have beenformed without intelligent design, or by any process of blind 80 THE EYE evolution. No known law of evolution by progressive modi-fication and survival of the fittest explains how a single eyecould generate, not a modification of its own form or struc-ture, but another single eye exactly like the first; nor howthousands of these single eyes, thus unaccountably generated,and individually capab

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