Physiology And National Needs
Physiology And National Needs
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In our eReader you can find the full English version of the book. Read Physiology And National Needs Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Physiology And National Needs
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To quickly assess the difficulty of the text, read a short excerpt:
It was quite evident that a weevily sample of barley had been sealed up and that weevils had been able to maintain themselves for four years in some of the tins in which the soldering had been imperfect. It must be remembered that an imperfectly closed vessel, such as a tin can, itself ^' respires, " to use a much-abused word in another of its many senses, to some extent like a human being. Changes of temperature and pressure pump air in and out of any small opening, so that the oxygen supply i...n the interior is constantly being renewed. The same process is responsible for the appalling accumu- lation of dust that takes place in closed drawers in London. The incoming air is laden with dust particles which are deposited before the air is replaced by a fresh dust-laden supply.
128 PHYSIOLOGY AND NATIONAL NEEDS Thus it is evident that a very minute aperture in a tin or other receptacle may be quite sufficient to maintain a number of insects in a healthy con- dition in the interior, and to give rise to the belief in their independence of ventilation.
What to read after Physiology And National Needs?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Dendy to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
It was quite evident that a weevily sample of barley had been sealed up and that weevils had been able to maintain themselves for four years in some of the tins in which the soldering had been imperfect. It must be remembered that an imperfectly closed vessel, such as a tin can, itself ^' respires, " to use a much-abused word in another of its many senses, to some extent like a human being. Changes of temperature and pressure pump air in and out of any small opening, so that the oxygen supply i...n the interior is constantly being renewed. The same process is responsible for the appalling accumu- lation of dust that takes place in closed drawers in London. The incoming air is laden with dust particles which are deposited before the air is replaced by a fresh dust-laden supply.
128 PHYSIOLOGY AND NATIONAL NEEDS Thus it is evident that a very minute aperture in a tin or other receptacle may be quite sufficient to maintain a number of insects in a healthy con- dition in the interior, and to give rise to the belief in their independence of ventilation.
What to read after Physiology And National Needs?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Dendy to read onlineMoreLess
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