Fluids, resistance of, [18]
Flying machine, Henson, [212]
Do. Stringfellow, [213]
Do. Cayley, [215]
Do. Phillips, [216]
Do. M. de la Landelle, [217]
Do. Borelli, [219]
A flying machine possible, [2], [3]
Forces which propel the wings of insects, bats, and birds, [186], [189]