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The chlorophyl appears to assume a darker hue, and the granules become more densely crowded. This appearance increases until the extremity of the tube appears almost swollen. Soon the densely congregated granules at the extreme end will be seen to separate from the endochrome of the filament, a clear space sometimes, but not always, marking the point of division.
They do not grow, but they are very active; they expend energy without any apparent means of keeping up the supply. How do they do it? They absorb it directly from the sun, Fabre thinks, which means that here is an animal between which and the organic world the vegetable chlorophyl plays no part, but which can take at first-hand, from the sun, the energy of life.
But it was synthetic, far more efficient, and it could use much stronger sunlight as an energy source. Like chlorophyl, too, it produced edible starches and sugars that could be imbibed, mixed with water, through a tube inside the Archer's helmet. Even with the Archer enclosing him, Nelsen's mind didn't quite reach. He had learned a lot about space, but it remained curiously inconceivable to him.
He begins his study of life and its evolution by considering how nutrition and the derivation of energy can have taken place before chlorophyl had come into existence; and he very pertinently points to the prototrophic bacteria as probably representing "the survival of a primordial stage of life chemistry."
Though we can not state the constitution of this chlorophyl, we know that, except by turning acid in the stomach, it remains inert on the human system, as one might imagine would happen if he swallowed a bunch of green grass. Lignin, with which it is always associated, is mere woody fibre, and has no direct physical action.
In this way Engelmann was able to determine the evolution of oxygen by Euglena and by chlorophyl granules. By H SCHAEPPI. Ten grms. of sulphur, pulverized as finely as possible, are covered with hot water and a few drops of nitric acid digested for some time, filtered, and washed till the washings have no longer an acid reaction.
So, too, in Velella, in sea-anemones, and in medusae; in all cases the protoplasm and nucleus, the cellulose, starch, and chlorophyl, can be made out in the most perfectly distinct way. The failure of former observers with these reactions, in which I at first also shared, has been simply due to neglect of the ordinary botanical precautions.
What corresponds in it to the directing will of the animal is, we believe, the direction in which it bends the energy of the solar radiation when it uses it to break the connection of the carbon with the oxygen in carbonic acid. What corresponds in it to the sensibility of the animal is the impressionability, quite of its kind, of its chlorophyl light.
"The logic of impecuniosity will doubtless accomplish more than the dissuasion of friends. Microscopic inspection of red and white corpuscles, of virus, tissues, protoplasm and chlorophyl is probably very interesting to lovers of microbes, and students of segmentation, but such abstract pursuits appertain to purple and fine linen. A profession means much; but ability to practise, infinitely more.
Out toward the black and mist-hidden sea that rolled forever in the gloom he gestured from the wall where they were standing. "Imagine!" he continued. "No sunlight for centuries! Without that, nothing containing chlorophyl can grow; and science has always maintained that human life must depend, at last analysis, on chlorophyl, on the green plants containing it.
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