Protogenes

“ Grace of conception and refinement of taste were his elements, and went hand in hand with grace of execution and taste in finish; powerful and seldom possessed singly, irresistible when united: that he built both on the firm basis of the former system, not on its subversion, his well-known contest of lines with Protogenes, not a legendary tale, but a well-attested fact, irrefragably proves: what those lines were, drawn with nearly miraculous subtlety in different colours, one upon the other or rather within each other, it would be equally unavailing and useless to inquire ”

“ Apelles was modest and generous: he was the first to praise Protogenes, and conferred a great benefit upon the latter by buying up his pictures, and giving out word that he was going to sell them as his own. Apelles was never afraid to correct those who were ignorant, and was equally ready to learn from any one who could teach him anything. It is said that on one occasion, when Alexander was in his studio, and talked of art, Apelles advised him to be silent lest his color-grinder should laugh at him. ”

“ The art, indeed, comprehends so many and such difficult parts, that no individual artist has been alike distinguished in all; even Apelles was said to yield to Amphion in disposition and harmony, to Asclepiadorus [Pg 90] in proportion, and to Protogenes in application.
The style of design of Raffaello, as seen in those drawings, divested of colours, which now form the chief ornaments of cabinets, presents us, if we may use the term, with the pure transcript of his imagination, and we stand in amaze at the contours, grace, precision, diligence, and genius, which they exhibit. ”

“ Apelles meant that in his painting Protogenes did not know when he had finished, which was the same thing as reproving him for being affected in his work. Thus this excellence, which is the opposite of affectation and which for the present we call nonchalance, besides being the true fountain from which grace springs, carries with it another ornament, which, in accompanying any human action whatever and however trifling it be, not only at once reveals the knowledge of him who performs it, but often leads us to rate his knowledge as much greater than in fact it is ”

“ These blots of light and dark, as being the result of labour, are always clumsy and indefinite; the effect of rubbing out and putting in, like the progress of a blind man, or of one in the dark, who feels his way, but does not see it. These are not so. Even the copy from Raphael's Cartoon of St. Paul preaching, is a firm, determinate outline, struck at once, as Protogenes struck his line, when he meant to make himself known to Apelles. The map of Allestone has the same character of the firm and determinate. ”

“ The ancient wall-paintings found in and near Rome. but more especially in Pompeii, are also mostly Greek in character, so far as their best qualities are concerned. The best of them, while betraying deficient skill in perspective, show such merits in coloring, such power of expression and such talent for composition, as to afford to the student a lively enjoyment and to intensify tenfold his regret that Zeuxis and Parrhasius, Apelles and Protogenes, are and will remain to us nothing but names. ”

“ On the evolution-hypothesis we are obliged to assume that the earliest living things—probably minute units of protoplasm smaller than any the microscope reveals to us—had the ability to appropriate directly from the inorganic world both the nitrogen and the materials for carbo-hydrates without both of which protoplasm cannot be formed; {64}since in the absence of preceding organic matter there was no other source. The general law of evolution as well as the observed actions of Protozoa and Protophyta, suggest that these primordial types simultaneously displayed animal-life and plant-life. ”

“ While the protoplasm of the biologist is a substance which is more or less opaque or visible, the protoplasm now conceived of as the material of the whole creation in its first state, when development is to begin, must, on the contrary, be altogether homogeneous and invisible. But none the less is it entitled to the name of protoplasm; nay, it alone must be justly entitled to that name, for it is the first of created things, and, being the product of an Almighty Being, it must be altogether plastic in His hands. It can have no constitution of its own derived from itself ”

“ As in the case of sexual propagation, so in that of karyokinesis, processes which are common to all the Metazoa are not wholly without their foreshadowings in the Protozoa. And seeing how greatly exalted is the office of egg-cells—and even of tissue-cells—as compared with that of their supposed ancestry in protozoal cells, it seems to me scarcely to be wondered at if their specializations of function should be associated with corresponding peculiarities of structure—a general fact which would in no way militate against the doctrine of evolution. ”

“ In fact, if all living beings come from protoplasm, it is quite as certain that, but for living beings, protoplasm would disappear. Without an egg you cannot have a hen—that is true; but it is equally true that, without a hen, you cannot have an egg. So in protoplasm; which, consequently, in the production of itself, offers no analogy to the production, or precipitation by the electric spark, not of itself, but of water. Besides, if for protoplasm, preëxisting protoplasm, is always necessary, how was there ever a first protoplasm? ”

“ A Protozoön is a single corpuscle of protoplasm which in different species of Protozoa varies in size from more than one inch to less than 1/1000 of an inch in diameter. In some species there is an enveloping cortical substance; in other species no such substance can be detected. Again, in most species there is a nucleus, while in other species no such differentiation of structure has hitherto been observed. ”

“ Now this wonderful substance, chemically and physically the same in the highest animal and in the lowest plant, has been all along the puzzle of the biologist. How is it that in man protoplasm works out human structure; in fowl, fowl structure, &c. &c., while the protoplasm itself appears to be everywhere the same? To Professor Yaeger belongs the great merit of having shown us that the protoplasms of the various species of plants and animals are not the same; that each of them contains, moreover, imbedded in its molecules, odorant substances peculiar to the one species and not to the other. ”

“ These component units of organic matter, the individual cells, as will be explained later, seem physically and even chemically mere duplicates of one another. They may not all be of the same size; but they are all composed of protoplasm, and the protoplasm of plants cannot be distinguished from that of animals by any physical or chemical tests known to modern science. The protoplasm in the brain of a bird is the same as that in its toes; and no metaphysical subtilties about heredity have ever explained why the one does a different work from the other. ”

“ In every species which multiplies by this kind of homogenesis, each generation consists of males and females; and from the fertilized germs they produce the next generation of similar males and females arises: the only needful qualification of this statement being that in many Protophyta and Protozoa the conjugating cells or protoplasts are not distinguishable in character. ”

“ If so, it follows that to achieve the transformation of the Protozoon into Man, it requires only that in the space of 250 generations the change shall be as great as that which the human fœtus undergoes in a minute; or, otherwise stating the fact, it requires that each generation shall differ from the last by as much as the fœtus differs from itself after an interval of a fourth of a second. ”

“ Hence the Protozoa are to be regarded as a convenient rather than a natural group, and may be characterized generally as follows: Organisms in which the individual is a single cell, that is to say, consists of a single undivided mass of protoplasm which is capable of independent existence in a suitable environment; if many such individuals be combined together to form a colony, as frequently occurs, there is no differentiation of the individuals except for reproductive purposes, and never for tissue-formation as in the Metazoa. ”

“ So far as yet discovered, all protoplasm, whether vegetable or animal, is derived from pre-existing protoplasm. The spontaneous production of living matter from non-living materials has never been satisfactorily proved. The particular kind of protoplasm which we are about to consider—viz., the human germ—is the combined derivative of certain glands which exist in separate adult human beings who represent the opposite sexual polarities belonging to all except the lowest vegetable and animal types. ”

“ If we are entitled to assume that protoplasm appeared not in one microscopic spot alone, but in many153 places and in vast quantities—and this is surely the more justifiable assumption—then we must also admit that these germinal starting-points were from the first, or very shortly afterwards, differentiated by variations in their elementary composition. Now we know that a very minute change in composition may lead to immense differences in evolution. Thus the descendants of two slightly different progenitors may, by continual differentiation, become very markedly unlike ”

“ The evidence points to a common and universal law that continued life is an attribute of an especially endowed protoplasm, termed germ plasm, which forms the material basis of the reproductive cells.
The history of single Protozoa, if taken superficially, seems to point to the fact that the protoplasm of these cells does not die a natural death, but continues to live in successive generations of similar individuals. The individual cell appears to be entirely self-sufficient ”

“ Protozoa are unicellular organisms possessing a nucleus distinct from the cytoplasm. They belong to the Protistenreich of Haeckel, a kingdom which unites the simplest and most primitive forms of life, and which may be considered equivalent in systemic value to the animal and vegetable kingdoms.
The protozoal cell constitutes an entire individual; it may exist singly, or combined in the form of cell colonies.
The body is a mass of protoplasm sometimes enclosed in a limiting envelope. ”

“ Heterogenesis prevails among organisms of which the food, though abundant compared with their expenditure, is dispersed in such a way that it cannot be appropriated in a wholesale manner. Protophyta, subsisting on diffused gases and decaying organic matter in a state of minute subdivision, and Protozoa, to which food comes in the shape of extremely small floating particles, are enabled, by their rapid agamogenetic multiplication, to obtain materials for growth better than they would do did they not thus continually divide and disperse in pursuit of it. ”

“ Even admitting that there are protoplasts (using this word to include plant and animal types) which are without nuclei, still they are not homogeneous—they are granular. Whether a nucleus is always present is a question still undecided; but in any case the types from which it is absent are extremely exceptional. Thus the most general structural traits of protoplasts are—the possession of an internal part, morphologically central though often not centrally situated, a general mass of protoplasm surrounding it, and an inclosing differentiated portion in contact with the environment. ”

“ If, for instance, a Protozoon, by constantly struggling against the mechanical influence of currents in water, were to gain a somewhat denser and more resistent protoplasm, or were to acquire the power of adhering more strongly than the other individuals of its species, the peculiarity in question would be directly continued on into its two descendants, for the latter are at first nothing more than the two halves of the former. ”

“ Protoplasm is the foundation of all organic life; and if we add to this that this substance is itself the ultimate of a previous system of formation, the formula will express the whole. Yet it must not be forgotten that the building up of organic life is the result of a constructive power common to the universe, and not indigenous to protoplasm alone. It must then be apparent that there is a power common to all matter, of which the motion or life inherent in living protoplasm is but a modification ”

“ From the first discovery of the Protozoa, their life-history has been the subject of the highest interest: yet it is only within our own times that we can say that the questions of their origin and development have been thoroughly worked out. If animal or vegetable matter of any kind be macerated in water, filtered, or even distilled, various forms of Protista make their appearance; and frequently, as putrefaction advances, form after form makes its appearance, becomes abundant, and then disappears to be replaced by other species. ”

“ To say wherever there is life there is protoplasm, is to say that there can be no life without protoplasm, and this is saying that where there is no protoplasm there is no life. But large parts of the body are non-protoplasmic; a bone is, indeed, permeated by protoplasm, but it is not protoplasm; it follows, therefore, that according to Professor Allman bone is not in any proper sense of words a living substance. ”

“ The ultimate step, as we must suppose, is the formation of living protoplasm out of these non-living proteids. A cardinal fact is that proteids admit of multitudinous transformations; and it seems not improbable that in protoplasm various isomeric proteids are mingled. If so, we must conclude that protoplasm admits of almost infinite variations in nature. Of course pari passu with this dual process—augmentation of protoplasm and accompanying production of carbo-hydrates—there goes extension of plant-structure and plant-life. ”