The Contents.

Gh. 4. Of the tnovable and gradientAutomata, representing the motionof living creatures , various founds,of birds, or beajls, and some of themarticulatet

Ch. 5. Concerning the possibility of fra-ming an Arkfor submarine Navigati-ons.The Difficulties and Conveniencesof fetch a contrivance.

Gh. 6 . Of the volant Automata; Ar-chy tas his Dove,and Regiomontanushis Eagle. The possibility and greatusefulness of such inventions .

Gh. 7. Concerning the Art of flying.The several ways whereby this hathbeen, or may be attempted.

Gh. 8. A resolution of the two chief dif-ficulties that seem to oppose the poffibi -lity of a flying Chariot.

Ch. 9. Of a perpetual motion. The seem-ing facility and real difficulty ofuny such contrivance. The several

ways