Scale Analysis VS Magnitude Comparisons

There are some subtle facts about scale analysis that make it more powerful than simply comparing orders of magnitude. A most remarkable example is that scale analysis can be applied, through a systematic use of dimensions, even when the precise equations governing the dynamics of a system are not known. The great physicist G. I. Taylor, a character whose prolific legacy haunts any aspiring scientist, gave a famous demonstration of this deceptively simple approach. In the 1950s, back when the...

 Bad Men Hoard Knowledge

It would be desirable for the government to authorize people to go into the factories and shops, to see the craftsmen at their work, to question them, to draw the tools, the machines, and even the premises. There are special circumstances when craftsmen are so secretive about their techniques that the shortest way of learning about them would be to apprentice oneself to a master or to have some trustworthy person do this. There would be few secrets that one would fail to bring to light by t...