New Developments in Science 



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gave the best results. The air flows around a body of this shape 

 with very little disturbance, whereas the air forced aside by a 

 sharp cutting front forms a partial vacuum which tends to hold 

 back the moving body. A blunt, or chopped-off, rear also causes 

 such a retarding vacuum. 



A body designed to pass through the air or water with only a 

 small amount of resistance is said to be streamlined. Today, all 



Brown Brothers. 



A STREAMLINED TRAIN 



This fast new train can travel over one hundred miles an hour. Notice the rounded 

 front, which slips through the air with a minimum of resistance. 



airplanes are more or less streamlined, and racing planes are very 

 carefully shaped to cut air resistance to a minimum. Racing cars 

 are also designed to travel at high speeds without creating a 

 vacuum to hold them back. Some automobile manufacturers are 

 now turning out streamlined closed cars for general use, and fast 

 streamlined trains are appearing on some railroads. Even the new 



