5. 
We have now jumped to a height of 50,000 meters or 50 kilometers, that is more
than 30 miles, and we notice a second effect of our jumps: not only are all lengths
we see reduced tenfold each time, but the area which comes into our field of
vision increases a hundredfold. So the above illustration covers a square 15 kilometers
on a side, and we see Bilthoven (1) as a suburb of Utrecht (2). A dotted
wavy line symbolizes a radio wave of 298 meters wave length reaching Bilthoven
from the transmitter southwest of Utrecht, called "Hilversum" after the town (3)
where its studios are. The 1.5centimeter square in the middle gives again, as
it has done each time, a reduced representation of the preceding illustration. As
this illustration contains a photograph of a detailed plan of Bilthoven, it just
shows the houses, though very minutely.
1 cm. in picture = 10^{5} cm. = 1,000 m. = 1 km.  Scale = 1:100,000 = 1:10^{5} 
