Science and Progress 553 



machines, sewing machines, refrigerators, coffee percolators, and 

 many other appliances. Electricity makes our streets safer at 

 night, carries us to and from our work, and helps run our auto- 

 mobiles. Almost daily, scientists find new ways in which to make 

 it serve us. 



What Science has taught us about food nutrients and food 

 values has insured a better selection of food for our table. What 

 it has taught about bacteria has enabled us to safeguard our food 

 supplies and to protect them against spoiling. What Science has 

 taught us about infection enables 'us more and more to protect 

 ourselves against disease. 



Many of our amusements are the gifts of Science: The radio, 

 the moving picture, the phonograph, the piano, and the automobile 

 we owe to scientists who labored hard to learn the secrets of elec- 

 tricity, light, sound and other forms of energy, and to make them 

 contribute to our needs and pleasures. Steadily Science is giving 

 us new and deeper insight into the wonders of the materials and 

 forces in our surroundings, enabling us to use them more and 

 more for our happiness and good. 



SUMMARY 



Progress means the continued betterment of our living condi- 

 tions and general welfare. Modern Science has made progress 

 rapid. 



In transportation, Science has largely replaced the horse and 

 wagon with the modern train, the automobile and the airplane; 

 in place of the sailing vessel it has given us great steamships. 



In communication, Science has supplanted the messenger on 

 horseback with modern mail service by rail and airplane and with 

 the telegraph, the telephone and the radio. 



To buildings and other structures, Science has contributed 

 new materials, such as steel, and new methods and powerful 

 machines to reduce hand labor. Construction is now a rapid 

 process. 



Science has taught the farmer how to produce more fruitful 

 crops and better animals, how to combat his natural enemies, and 

 how to make dry land produce crops. 



