. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. FUNGI 375 other plants and animals, and it has been a question whether to consider them plants or animals, but it is customary now to class them among plants as a special group of the fungi. Bacteria are the direct causes of most of the diseases of men and of other animals. The study of bacteria is a special subject called bacteriology, and it is by means of learning the habits of bacteria that our most effective meth- ods of preventing and curing disease
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. FUNGI 375 other plants and animals, and it has been a question whether to consider them plants or animals, but it is customary now to class them among plants as a special group of the fungi. Bacteria are the direct causes of most of the diseases of men and of other animals. The study of bacteria is a special subject called bacteriology, and it is by means of learning the habits of bacteria that our most effective meth- ods of preventing and curing disease have been discovered. They are the smallest known organisms, and their study requires microscopes of very high power of magnification. Doubtless there are some which are too small to be seen even by microscopes of the highest power. The existence of such bacteria has been indicated by the effects they produce. As to structure, bacteria are of three distinct types. They are spherical, rodlike, or spiral. (See Figure 173.) They occur either singly or in filaments. Some- times they have cilia and swim actively. Under favorable conditions they multiply very rapidly by division like the division of Pleurococcus. They appear to be present everywhere, ready to re- produce rapidly under any condition favorable to their growth. The most important principle of modern sanitation is the pre- vention of conditions which are favorable to the growth and spread of disease-producing bacteria. Many kinds of bacteria are capable of enduring conditions of temperature,. Fig. 173. — Various forms of bacteria, very highly 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 Coulter, John G. (John Gaylord), b. 1876. New York, American Book Co
Size: 1713px × 1458px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
