. The essentials of botany. Botany. PBOTOPHTTA. 109 frequently appear in tightly closed vessels -whose contents have been boiled. Some people have been led to explain their appearance under such circumstances by " spontane- ous generation;" but thus far the facts are capable of other explanation. 225. On account of their minuteness, bacteria may be. fj v<o Fio. 46.—Forms of Bacteria, o, Micrococcus prodigiosus; 6, Bacterium termo (resting stage); c. Bacterium lineola; d. Bacillus ulna; e. Spirillum rugula; /, Spirocnsete plicatilis; g. Spirillum volutans. Magniiled 650 times. pick
. The essentials of botany. Botany. PBOTOPHTTA. 109 frequently appear in tightly closed vessels -whose contents have been boiled. Some people have been led to explain their appearance under such circumstances by " spontane- ous generation;" but thus far the facts are capable of other explanation. 225. On account of their minuteness, bacteria may be. fj v<o Fio. 46.—Forms of Bacteria, o, Micrococcus prodigiosus; 6, Bacterium termo (resting stage); c. Bacterium lineola; d. Bacillus ulna; e. Spirillum rugula; /, Spirocnsete plicatilis; g. Spirillum volutans. Magniiled 650 times. picked up by currents of air and borne long distances, and in this way they are doubtless often carried from place to place. When a pool of putrid-water dries up, the bacteria with which it swarmed are blown away with the dust and dirt, dropping everywhere into pools, upon plants and ani- mals living and dead, and even entering our lungs with the air we Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt and company, ;
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