Healthy living . o defend their country; and in peacethere is work to do that is scarcely less coal that is burned to keep us warm in winter,and to run locomotives and drive the machinery infactories, must be dug out of the mines by humanmuscle. In other mines men are getting out the ironfrom the earth. In the factories the iron is made intosteel—the steel that builds our tall city buildings andour railroads and the great guns for our army. Thetall buildings themselves must be built, and the rail-roads must be laid, and w^hen they have been finished,the snorting locomotives must
Healthy living . o defend their country; and in peacethere is work to do that is scarcely less coal that is burned to keep us warm in winter,and to run locomotives and drive the machinery infactories, must be dug out of the mines by humanmuscle. In other mines men are getting out the ironfrom the earth. In the factories the iron is made intosteel—the steel that builds our tall city buildings andour railroads and the great guns for our army. Thetall buildings themselves must be built, and the rail-roads must be laid, and w^hen they have been finished,the snorting locomotives must be driven over them,pulling their long trains of cars behind. The men whodo these things must be strong in muscle, and they HOW THE PARTS OF OUR BODY MOVE 51 must be brave as well as strong. It is no uncommonthing for the miner or the railroad engineer or the manwho places the steel in a tall building to lose his lifefrom a fall or an accident of some other kind. How to Grow Strong.—Strength of body is a fine. Fig. 22.—Strong men and brave men are needed to-day to mine coaland iron, to make steel, to build railroads and tall buildings. Themen in the picture are placing the steel for a sky-scraper inthe City of New York. thing if it is used, not to bully and take things byforce, but to help and defend the weak and to do theheavy work of the world. Oh it is gloriousTo have a giants strength; but tyrannousTo use it like a giant.—Shakespeare. 5 2 HEALTHY LIVING Every boy and girl owes it to our country to be asstrong as he or she can, to develop all the muscles so asto be ready to do any work that may come, and readyto help the old and the ill who cannot do for people are naturally stronger than others, butwe can all strengthen our muscles by exercise. When amuscle is unused, it becomes soft and flabby. When itis used, it grows more and more powerful. So byexercising, each one of us can grow stronger and morefit for useful service every day. Many of us may n
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