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Fortunately, a crucial test occurred to me, that of placing a large number of leaves in various nitrogenous and non-nitrogenous fluids of equal density; and as soon as I found that the former alone excited energetic movements, it was obvious that here was a fine new field for investigation."
"I certainly would, 'Loney, except in very small quantities. Raw potatoes contain twenty-two per cent. of the worst form of non-nitrogenous food, and seventy-eight per cent. of water. You, Malone, with your sedentary habits, should never touch an ounce of potato. It excites the epigastric nerve and induces dyspepsia.
Fortunately a crucial test occurred to me, that of placing a large number of leaves in various nitrogenous and non-nitrogenous fluids of equal density; and as soon as I found that the former alone excited energetic movements, it was obvious that here was a fine new field for investigation.
They are rather complex chemical compounds, though not so complex as proteids. Since neither fats nor carbohydrates contain nitrogen, they are frequently classed together as non-nitrogenous foods. *Purpose Served by Carbohydrates, Fats, and Albuminoids.*—These classes of nutrients all serve the common purpose of supplying energy.
The Proteids, because they contain the element nitrogen and the others do not, are frequently called nitrogenous, and the other two are known as non-nitrogenous substances. The proteids, the type of which is egg albumen, or the white of egg, are found in muscle and nerve, in glands, in blood, and in nearly all the fluids of the body.
Joplin waved his hand in protest and continued, without heeding the interruption: "Now, if you're stupid enough to stuff your epigastrium with pork, you, of course, get an excess of non-nitrogenous fats, and in order to digest anything properly you must necessarily cram in an additional quantity of carbohydrates greens, potatoes, cabbage whatever Tine shoves under your nose.
For our experiments it was necessary to subject it all to great heat in an endeavour to separate the nitrogenous cellular substance from the non-nitrogenous waxy matter. With our limited appliances the only way we could think of was to cut it into fine pieces and cook it in a frying pan.
"Having failed to identify alcohol as a nitrogenous or non-nitrogenous food, not having found it amenable to any of the evidences by which the food-force of aliments is generally measured, it will not do for us to talk of benefit by delay of regressive metamorphosis unless such process is accompanied with something evidential of the fact something scientifically descriptive of its mode of accomplishment in the case at hand, and unless it is shown to be practically desirable for alimentation.
The tendrils of a plant know where the stake or cord is, and they reach out for it and twine themselves around it. Unwind them, and the next day they are found again twined around it. Move the stake or cord, and the tendril moves after it. The insect-eating plants are able to distinguish between nitrogenous and non-nitrogenous food, accepting the one and rejecting the other.
With our present knowledge of the blueberry, it is doubtful if it can be made a commercially cultivated crop. Lately, however, it is claimed that it can be grown in very poor, non-nitrogenous soil. A variety, however, called the Garden Blueberry, gives almost incredible yields, five bushels being reported from sixty plants.
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