All attempts at artificial aviation are not only dangerous to human life, but foredoomed to failure from the engineering standpoint.

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.

Whenever a total eclipse of the sun was visible in an accessible region parties were sent out to observe it.

My father followed, during most of his life, the precarious occupation of a country school teacher.

The mathematician of to-day admits that he can neither square the circle, duplicate the cube or trisect the angle. May not our mechanicians, in like manner, be ultimately forced to admit that aerial flight is one of that great class of problems with which men can never cope... I do not claim that this is a necessary conclusion from any past experience. But I do think that success must await progress of a different kind from that of invention.

As the existence of a corps of professors of mathematics is peculiar to our navy, as well as an apparent, perhaps a real, anomaly, some account of it may be of interest.

Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible.