The Irides, the Coronaes, Haloes, and other Phenomena of Colours: the Generation and Solution of which may be investigated on the Spot.
336. 8. Geography may become a new Science.
336. 9. Use of the Balloon for Signals in the calm Air, above Molestation; above Winds still blowing below: to discover the Positions of an Army, or Navy.[112]
336. 10. To throw principal Men into a Town: and convey others out of it.
336. 11. With the Montgolfier Balloon, to try Experiments on Light, and Fire: to transport great Weights: raise them out of the Water: draw up Piles, raise Trees, Vessels, &c.
336. 12. The Parashute to secure a Man from too precipitate a Fall, is to be 5 Yards in Diameter, when extended: the Man,—weighing 140 Pounds, and the Parashute weighing 10 Pounds, with a Surface of 150 square Feet,—woud, in that Case, feel no greater Shock than if he had fallen from the Height of six Feet.
336. 13. Compass and its Variations: also the different Branches in Astronomy.
His Hints on the Direction of the Machine are ingenious.
337. 1. Wheels furnished with Wings.
337. 2. Imitations of the Form and Motions of Fish.[113]