1 8 TWO NEW WORLDS 



10 22 times smaller, the same absolute acceleration, 

 measured first in our world and then in the infra- 

 world, will appear 10 22 smaller in the second case 

 than in the first. 



To give an illustration : A body acquires on earth 

 a velocity of 981 cm. per second in one second under 

 the action of the earth's gravitational force. The 

 acceleration is, therefore, 981 units. Now measure 

 the same acceleration in the infra-world. One 

 centimetre becomes 10 22 cm., one second becomes 

 10 22 seconds, and a velocity of 10 22 cm. per 10 22 

 seconds is unit velocity, as on earth. But this unit 

 velocity is acquired in one earthly second, which in 

 the infra- world is drawn out to 10 22 infra-seconds, 

 or about 100 billion infra-years, and our normal 

 acceleration will therefore appear to be so slight 

 as to be imperceptible. It will be something com- 

 parable with the acceleration of a building gradually 

 subsiding into the earth, and being buried in the 

 course of untold ages. 



It follows that if the inhabitants of the infra- 

 world define acceleration by our methods, their 

 unit acceleration must be prodigious in our eyes, 

 amounting, as it does, to 10 22 of our units. 



The time-keepers of the infra- world are the stars 

 of the infra-heavens, or what we call the atoms. 

 The infra-planets, alias electrons, revolve round the 

 infra-suns, alias atoms, as much more frequently as 

 they are smaller than our planets and suns respec- 



