 | Henry Fox Hewes - 1900 - 332 pages
...These ferments which play this important role in the scheme of nature are minute living organisms, so small that they can be seen only with the aid of a powerful magnifying lens. Because they are bodies possessing life they are called organized ferments.... | |
 | Herbert William Conn - 1903 - 288 pages
...caused by very small animals or plants that get into the human body and multiply there. Most of them are so small that they can be seen only with the aid of a very powerful microscope. Parasitic Animals. — There are a few animal parasites that occasionally... | |
 | Hartland Law - 1905 - 620 pages
...larger head to accommodate them. A white nerve fiber arises in each of these minute gray cells, which are so small that they can be seen only with the aid of a powerful microscope. These fibers, existing in countless numbers, compose the mass of white matter... | |
 | J. I. Jegi - 1905 - 380 pages
...health as well as of personal hygiene. 6. The Amoeba. — In water and moist earth there live animals so small that they can be seen only with the aid of a microscope. The amoeba belongs to one of these classes. It looks when highly magnified like a bit... | |
 | 1907 - 880 pages
...and thickness, and the spirals, in the number of coils, as well as in the motility of the coils. They are so small that they can be seen only with the aid of high power microscopes, and then often only after they have been stained, being otherwise translucent... | |
 | Herbert William Conn - 1909 - 348 pages
...caused by very small animals or plants that get into the human body and multiply there. Most of them are so small that they can be seen only with the aid of a very powerful microscope. Parasitic Animals. — There are a few animal parasites that occasionally... | |
 | United States. Bureau of Animal Industry - 1912 - 676 pages
...animals, which are multicellular. The Protozoa, though generally larger than bacteria, are almost all so small that they can be seen only with the aid of the microscope. The.y are widely distributed in nature, being found almost, everywhere, and, like bacteria,... | |
 | United States. Bureau of Animal Industry - 1912 - 744 pages
...animals, which are multicellular. The Protozoa, though generally larger than bacteria, are almost all so small that they can be seen only with the aid of the microscope. They are widely distributed in nature, being found almost everywhere, and, like bacteria,... | |
 | United States. Bureau of Animal Industry - 1912 - 678 pages
...animals, which are multicellular. The Protozoa, though generally larger than bacteria, are almost all so small that they can be seen only with the aid of the microscope. They are widely distributed in nature, being found almost everywhere, and, like bacteria,... | |
 | 1912 - 676 pages
...animals, which are multicellular. The Protozoa, though generally larger than bacteria, are almost all so small that they can be seen only with the aid of the microscope. They are widely distributed in nature, being found almost everywhere, and, like bacteria,... | |
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Considered individually, these atoms are so small that they can be seen only with the aid of a powerful microscope, if at all. 
