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The alkaloids, that most important class from a medical and pharmaceutical point of view, have until quite recently been defined in the books simply as "vegetable bases, containing nitrogen." Whether they were marsh-gas or benzol derivatives was not made out; how the four elements, carbon, hydrogen, oxygen, and nitrogen, were grouped together in them was absolutely a thing unknown.
But this simple explanation falters before further experiments which show, paradoxically enough, that the electrical resistance of carbon exactly reverses what has just been said of pure metals, becoming greater and greater as the carbon is cooled.
As the diaphragm vibrated under the sound-impulses the pressure upon the carbon granules was varied. An electric current was passed through the carbon particles, whose electrical resistance was varied by the changing pressure from the diaphragm. Thus the current was thrown into undulations corresponding to the sound-waves, and passed over the line and produced corresponding sounds in the receiver.
But the accumulating carbon dioxide in the air they breathed, made them sleepier. They had to sit down, then lie down. Frank figured that they had come something over a quarter of the eight hundred miles. This was about the end of Frank Nelsen, would-be Planet Strapper from Jarviston, Minnesota.
So we have returned to the subject of respiration, on which I always seem to be turning my back; but now the question is, what brings us to it again? And this is the explanation. When the oxygen picked up in the lungs by the blood has traveled with it to the organs, he finds there two well-known friends hydrogen and carbon. You smile, and exclaim at once, "Then he marries them, does he?"
But we know that the substance of a brain-cell is the wonderful physical basis of life called protoplasm, that demanded our attention at the outset. The chemicals that go to make up protoplasm are everywhere carbon, hydrogen, oxygen, and other substances that are exactly the same outside the body as inside.
I need a metal of greater conductivity than any attainable to get real results. The carbon that I am using does not throw off enough radio activity to produce a sufficient number of electric impulses to the atmosphere." Jack and Tom looked puzzled. "You don't understand me I see," said Mr. Chadwick. "No, I must say I don't," said Jack; "you see " "It's pretty technical," broke in Tom.
And the way that it does so is this the oxygen grapples with the carbon, and the hydrogen drives the nitrogen out of your body. Do you understand me, Charles?" "No," said Hawermann, laughing heartily, "you can hardly expect me to do that." "Never laugh at things you don't understand, Charles. Listen I have smelt the nitrogen myself, but as for the black carbon, what becomes of it?
As the bisulphide of carbon has a strong power of softening indurated caoutchouc, I soaked in it during a short time several rootlets of a plant which had grown up a plaistered wall; and I then found many extremely thin threads of transparent, not viscid, excessively elastic matter, precisely like caoutchouc, attached to two sets of rootlets on the same branch.
As to GIVING UP because the almanac or the Family-Bible says that it is about time to do it, I have no intention of doing any such thing. I grant you that I burn less carbon than some years ago. I see people of my standing really good for nothing, decrepit, effete, la levre inferieure deja pendante, with what little life they have left mainly concentrated in their epigastrium.
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