THE SPECIAL SENSES.

According to the now almost universally (that is, among educated

scientific people) accepted theory of Evolution, each living being upon

this earth is a result of a very slow process of development, which

commenced with a low form of life many millions of years ago, and has

since been operating continuously, becoming more and more complex, and

imperceptibly attaining greater perfection as each fresh stage was

accomplished. From the homogeneous to the heterogeneous, from inorganic

to organic, from Amœba to man, the evolutionary development has slowly,

steadily, and surely advanced step by step, in obedience to certain

well-defined laws. Yet it is impossible to discern in this slow process

of evolution any well-marked difference between one particular species

and the next of kin, although the difference becomes clearly apparent

if we take two species separated from each other by considerable

time; just as it is impossible to detect any alteration in form and

feature between a child of six days old and the same child of seven

days old, while the change is very evident after the lapse of several

weeks or months. If we were to photograph a human being regularly

each day from the moment of its birth to the time of its decease at

the age of eighty, we should be unable to detect any real difference

between the portraits on any two consecutive days; but the difference

between the child of a week old and the young man of twenty years would

be enormous, as would be that between the full-grown youth and the

tottering old man. As the human individual in its earliest condition

of existence is not possessed of the same faculties as it afterwards

enjoys as a more perfect development, so, in like manner, the species

in its primal condition was wanting in the loftier qualities now

possessed by the higher animals, such as consciousness, sight, hearing,

taste, smell, and touch, all of which have been gradually evolved

as the various life-forms developed from lower and more simple to

higher and more complex kind. For instance, at a very early period of

man’s individual existence he possessed no brain, eyes, ears, mouth,

or nose, and, therefore, was quite incapable of mentating, seeing,

hearing, tasting, or smelling; but, as the organism very gradually

developed into a higher and more complex kind, these various organs

manifested themselves, and slowly arrived at such perfection as we

find in the human infant at birth. Precisely so was it with the race.

The lowly Moneron was of homogeneous structure, possessing neither

parts nor kind, but gradually differentiating into nucleus and cell;

its descendants, the Gastrœada, becoming possessed, by a process of

invagination, of an external layer of nucleated cells and an internal

and more delicate layer, thus forming a hollow organism, or Gastrula.

This external cellular integument was the original sense-organ of the

animal kingdom, from which developed the organs of special sense.

Though without nerve and special sense-organs, yet these little hollow

Gastrœada, and, in fact, their ancestors, the Amœbæ, which consisted

of simple protoplasmic cells, each enclosing a nucleus, were possessed

with sensory perception, being influenced by light, and by variations

of pressure and temperature. As the evolutionary process continued, and

the animal kingdom assumed higher forms, the original epidermal general

sense-organ became converted into several special organs of sense, each

specialisation commencing with a simple depression upon the integument

of the organism; numerous little epidermal nerves of perception were

formed, which could perceive changes of pressure and of temperature,

and some of which gradually became enabled to understand particular

influences affecting them, such as those produced by a strong odour,

light-waves, and sound-waves. By adaptation, the extremities of these

sense-nerves became expanded and enlarged, so as to enable them the

better to understand the particular influences; and this expansion was

accompanied by a corresponding depression on the integument, which

cup-like formation afterwards became converted into an eye, or other

organ of special sense, very imperfect in the invertebrate forms of

life, imperfect in the fish, more perfect in the amphibian, and still

more perfect in the mammal forms, such as apes and men. In short, the

life-history of the individual is an exact counterpart in miniature of

the life-history of the species up to the particular point reached by

the particular individual.

The order and mode of development is precisely the same in all animal

organisms, and may be conveniently studied by placing a hen’s egg in

an incubating machine, and carefully watching it for the space of

three weeks. It will be observed that the eye, ear, nose, and mouth

are not present at the commencement of the process, but make their

appearance later on, about the third or fourth day of incubation, as

tiny depressions on the integument, from which condition they gradually

develop into perfect organs of special sense, as possessed by the

full-grown chicken; the eyes, which receive the impressions caused

by light-waves; the ears, which receive those made by sound-waves;

the nose, by which odours are discerned; the mouth, which holds the

taste-organ; and the skin, which remains the organ of touch and

perception of temperature. Now, when we consider for a moment these

wonderful phenomena, we cannot help being struck by the remarkable

manner in which the animal kingdom has been slowly and steadily

progressing towards perfection, in spite of the enormous physical

difficulties encountered; and we cannot help coming to the conclusion

that, inasmuch as there was once a time when no animal existed having

eyes, ears, nose, or mouth, and, still later, a period when these

special sense-organs existed in a very imperfect condition, it is

highly probable that in the future ages man, who now possesses special

senses of a high order, will acquire even still more highly-developed

faculties.

In congratulating ourselves upon the advance made by our own particular

species over other members of the animal kingdom, we must never forget

that, although we can mentate, see, hear, smell, taste, and feel,

while myriads of our lowly brethren can do none of these, we yet are

incapable of solving the mighty problems of the universe with any

or all of these organs without artificial aid. No man on earth has

ever yet been able to solve the mighty problem of existence, in spite

of his great intellectual powers. No man has ever yet been able to

see a millionth part of the wonders in the heavens above, or in the

earth beneath, with his own unaided eye; but with the telescope and

microscope new worlds have been opened out to him. We are as yet,

undoubtedly, in but a transitory condition, the victims of an imperfect

organisation, subject to a partially-developed brain and nervous

system, and to five imperfect special senses. We must accept the

situation philosophically, and without grumbling, and do our best to

make good use of the senses we have, and leave the solution of problems

we are unable to solve to future races of men, who will be possessed of

better materials with which to operate.

[Illustration: “THE SUPREME SPIRIT IN THE ACT OF CREATION BECAME BY

VOGA, TWO-FOLD, THE RIGHT SIDE WAS MALE, THE LEFT WAS PRAKRITI.”

(Brahma Vaivartta Puranu.)

BRAHM THE HINDU ANDROGYNOUS CREATOR

Copied from Inman’s “Ancient Faiths”.]

[Illustration: ISIS, HORUS AND FISH

From a photograph of a small bronze image in the Mayor collection

of Browne’s Museum, Liverpool. Copied from D^(r) Inman’s “Ancient

Faiths”.]

[Illustration: THE VEDIC VIRGIN, INDRANEE, WIFE-MOTHER OF SAVIOUR-GOD,

INDRA. From Hislop’s “Two Babylons”.]

[Illustration: THE HINDU GOD VISHNU, NURSED BY HIS VIRGIN WIFE-MOTHER,

LAKSHMI. From Moore’s “Hindu Pantheon”.]

[Illustration: DEVAKI AND CHRISTNA From Moore’s “Hindu Pantheon”.]

[Illustration: THE HINDU GOD SIVA, NURSED BY HIS VIRGIN WIFE-MOTHER,

PARVATI. Copied from statuette in Liverpool museum.]

[Illustration: AMEN-RA (After Drummond.)]

[Illustration: CRUX ANSATA

Found marked on the breast of an Egyptian mummy in the University

College Museum, London.]

[Illustration: THE ASSYRIAN VIRGIN ISHTAR

From Rawlinson’s “Ancient Monarchies”.]

[Illustration: CRUCIFIXION OF CHRISTNA

From old Hindu engraving. After Higgins.]

[Illustration: VIRGIN AND CHILD AT IDALIUM IN CYPRUS

After Rawlinson

(“Herodotus”)]

[Illustration: ISIS AND HORUS THE EGYPTIAN VIRGIN AND SAVIOUR-GOD

From Rawlinson’s “Herodotus”.]

Evolution and creation · 第 26 / 58 题