Ten decimal places of π are sufficient to give the circumference of the earth to a fraction of an inch, and thirty decimal places would give the circumference of the visible universe to a quantity imperceptible to the most powerful microscope.
Simon NewcombI had not yet gotten into the world of light. But I felt as one who, standing outside, could knock against the wall and hear an answering knock from within.
Simon NewcombThe demonstration that no possible combination of known substances, known forms of machinery and known forms of force, can be united in a practical machine by which men shall fly along distances through the air, seems to the writer as complete as it is possible for the demonstration to be.
Simon Newcomb