INFRA- WORLD MECHANICS AND PHYSICS 41 



-i where I is a length and g an acceleration. The 



length is reduced 10 22 times, and the acceleration, 

 however produced, is increased 10 22 times. Hence 

 the quotient is reduced 10 44 times and the periodic 

 time 10 22 times, thus giving infra-seconds instead of 

 seconds. 



Kinetic energy is proportional to mass, but it is 

 more concentrated as regards volume. Infra-world 

 bullets are much smaller than ours in proportion to 

 their energy. Their bulk is a billion times smaller, 

 but since all substances are correspondingly harder, 

 they are not more penetrative than before. A 

 remarkable reduction is that of moments of inertia, 

 clue to the simultaneous reduction of mass and 

 length. The reduction is necessary in order to pro- 

 duce the proper amount of energy by rotation in a 

 very small orbit. 



In the electrical quantities, what strikes one aro 

 the comparatively enormous electric surface den- 

 sity and intensity of magnetisation. The latter, in- 

 creased nearly a trillion times, would be the envy of 

 our electrical engineers. Electric currents aro also 

 extremely powerful, being nearly a trillion times 

 stronger than we could pass through the corre- 

 sponding thickness of wire. But the heating effect 

 is much less marked, as conductivity is increased 10 44 

 times. Inductance is as mii'-h reduced as conduc- 

 tivity is increased, so that telephony ought to have 



