. Biology and man. Biology; Human beings. r»wiar-»!i. Liuttil btates I'ublic HtaUlj sir\ice KEEPING RATS FROM GEHING ASHORE —OR ABOARD Ships plying between ports in which there are infected rats and other ports receive special attention from health officers. Metal shields are used to prevent rats infected with the plague from getting off the boats, or from getting aboard in plague areas. In addition, of course, pains are taken to destroy rats on ships, and to prevent their breeding scurvy, beriberi, rickets, and other diseases are due to the lack of specific vita- mins in the diet. Modern indu
. Biology and man. Biology; Human beings. r»wiar-»!i. Liuttil btates I'ublic HtaUlj sir\ice KEEPING RATS FROM GEHING ASHORE —OR ABOARD Ships plying between ports in which there are infected rats and other ports receive special attention from health officers. Metal shields are used to prevent rats infected with the plague from getting off the boats, or from getting aboard in plague areas. In addition, of course, pains are taken to destroy rats on ships, and to prevent their breeding scurvy, beriberi, rickets, and other diseases are due to the lack of specific vita- mins in the diet. Modern industry and modern city living have brought into our environ- ment physical and chemical changes that often disturb us. Various dusts and fumes affect the breathing organs, or introduce into the body substances that modify the metabolism. The materials handled by workers affect the skin, the nerve-endings, and perhaps deeper tissues and organs. Lighting condi- tions, unusual or loud sounds, affect the inner co-ordination of processes, even when we are not aware of them. Eyestrain has been found to result in nervous tension which in turn influences the digestive process and possibly other proc- esses by way of the autonomic nervous system and the endocrines. General fatigue has long been recognized to be an outcome of excessive exer- 628. 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 Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965; Bingham, N. Eldred (Nelson Eldred), 1901-. Boston, New York, [etc. ] Ginn and company
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Keywords: ., book, bookcentury1900, booksubjectbiology, booksubjecthumanbeings
