ut sine animali moveantur cum impetu inaestimabili, et instrumenta volandi et homo sedens in medio instrumenti revolvens aliquod ingenium per quod alae artificialiter compositae aerem verberent, ad modum avis volantis.
that without the animal moved swiftly priceless, and instruments to fly and a man sitting in the middle of the instrument through which the wings of a revolving nature of some striking art combined air, like a bird flying.