From the 1968 lecture programme:
Let us look at our world with the eyes of a voyager from Lilliput or Brobdingnag. What large and small things can we find, in the living world, in the rest of nature, in the great storehouse of manmade things? We will examine the tiniest objects ever made by man, and some of the largest, too. Since we need to speak of many scales, we will discuss the simple artihmetic of large and small numbers, geometry of size itself, and the nature of length, area, and volume.