id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
38109	Krueger, William G.	Lecture on Artificial Flight Given by request at the Academy of Natural Sciences			.txt	text/plain	12274	481	62	The problem of artificial flight is of such great importance to The idea of sailing through the air in a flying machine is not new, nor the different air currents travel far faster in the upper regions than flying machines we read of have likely been only a modified form of the balloons were invented, conceived the idea that air, like water, must For successful flight, then, a just proportion of surface and weight is that less surface and less power is required and flight maintained the so will the coming flying machine differ from the construction of bird, for flying machines; and experiments are now being made, in different so far only to elevate and propel machines by vertical fan-like natural wings, on the contrary, present small flying surfaces, and their their own weight, because the power of support which the air affords to	./cache/38109.txt	./txt/38109.txt