The 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 NewcombFlight by machines heavier than air is unpractical and insignificant, if not utterly impossible.
Simon NewcombIf my impressions are correct, our educational planing mill cuts down all the knots of genius, and reduces the best of the men who go through it to much the same standard.
Simon NewcombAerial flight is one of that class of problems with which man will never be able to cope.
Simon Newcomb