Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 Excerpt: ...to be a red liquid, and found that it was really a colorless liquid in which red bodies were floating; very much as these cranberries float in the water of this big tube which I hold in my hand. A tall measuring glass having a bore of about two inches, and partly filled with water and cranberries, was so held before the audience as to make the mass flow from one end to the other, and produce a tolerably red mixture which, on standing, separated into a red and a colorless layer. He also looked at putrid water, and found what he took to be animals; very minute, wriggling, worm-like things. Finally, he turned his glass upon yeast, and found that even the liquid portion was no more a mere liquid than the blood, but was really a colorless fluid filled with milky-looking grains; very much as if I had had small white beans instead of cranberries in that tall tube with the water. Leeuwenhoek did not know what these grains were; but a century later, about the time when George Washington was our President, an Italian named Fabroni said he believed them to be alive; in fact they seemed to him half vegetable and half animal, or vegeto-animal in their nature. Fifty years more went by, and better microscopes had been made when, in i837 (about the time Van Buren succeeded Jackson as President), a Frenchman, Cagniard de la Tour by name, went to work upon these grains, and found them budding and growing! He at once said that they were living plants, and many people began working upon this curious microscopic vegetable; till to-day, with yet better microscopes, we know beyond question that yeast is a liquid swarming with myriads of curious little plants, all much alike, yet of varying sizes and shapes. A large diagram hanging behind the speaker was referred to, and single ce...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 Excerpt: ...to be a red liquid, and found that it was really a colorless liquid in which red bodies were floating; very much as these cranberries float in the water of this big tube which I hold in my hand. A tall measuring glass having a bore of about two inches, and partly filled with water and cranberries, was so held before the audience as to make the mass flow from one end to the other, and produce a tolerably red mixture which, on standing, separated into a red and a colorless layer. He also looked at putrid water, and found what he took to be animals; very minute, wriggling, worm-like things. Finally, he turned his glass upon yeast, and found that even the liquid portion was no more a mere liquid than the blood, but was really a colorless fluid filled with milky-looking grains; very much as if I had had small white beans instead of cranberries in that tall tube with the water. Leeuwenhoek did not know what these grains were; but a century later, about the time when George Washington was our President, an Italian named Fabroni said he believed them to be alive; in fact they seemed to him half vegetable and half animal, or vegeto-animal in their nature. Fifty years more went by, and better microscopes had been made when, in i837 (about the time Van Buren succeeded Jackson as President), a Frenchman, Cagniard de la Tour by name, went to work upon these grains, and found them budding and growing! He at once said that they were living plants, and many people began working upon this curious microscopic vegetable; till to-day, with yet better microscopes, we know beyond question that yeast is a liquid swarming with myriads of curious little plants, all much alike, yet of varying sizes and shapes. A large diagram hanging behind the speaker was referred to, and single ce...
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