ADDRESSED TO AIRONAUTS. [Sidenote: New Kind of Cable and Reel recommended.] Section 13. The following Anchor and Cable, for greater Safety and some particular Uses, are recommended as an Improvement. A _strong_ Iron double Grapple, moving on a Swivel, fastened to a _Rope_,[5] half a Mile, or better _a Mile_ long: and, if not all; a Part of which at least, at the Distance and for the Length of ten Yards from the Grapple, shoud be of Silk, as a non Conductor: also other ten Yards, at its upper End, counting from the Reel or Pulley to which the Silk shoud be tyed. The Reel or Pulley being at least eighteen Inches in Diameter, and fixed vertically in the Center of the upper Hoop, seven Feet above the Bottom of the Car; by Means of three or four Iron Rods fastened in the Bottom of the Car, and meeting together above the Reel: the Rods so strong as to prevent the Shock which otherwise the Aironaut woud receive in alighting on the Ground. The Reel shoud have one, or two Iron Winches or Handles, one at each End of the Reel; with moveable Handles of Wood round them. The Reel may be furnished with sudden Checks; or gradual Clamps, as in a Mil, to retard the Velocity. SIGNS TO BE OBSERVED, WHEN IN THE AIR. [Sidenote: Cautions against two Extremes.] 14. The two Extremes to be avoided are, too lofty an Ascent: and too precipitate a Fall. [Sidenote: 1st. Too lofty an Ascent.] The former is to be apprehended when Balloon has swelled considerably, and strains as if ready to burst; from the Shape of an inverted Cone, or Children’s Top, changed to that of an oblate Spheroid, or Turnep. It is therefore necessary to look up at the Balloon from Time to Time: and either open the Mouth, or as it is sometimes called the Neck, _for an Instant_; or draw the Valve; which is done by pulling a Cord fixed at the Top of the Machine and running thro’ it to the Hand, till the Balloon only appears full without straining. These Operations are to be occasionally repeated during the _Ascent_. If it is required to rise still higher; gradually throw out Ballast, and repeat the Operations. The proposed Quantity of Ballast being thrown out, the Balloon will have acquired its utmost Height, and become stationary, i.e. neither rise nor fall. The self Descent of the Balloon is only in Proportion, as the inflammable Air or Gass escapes thro’ imperceptible Holes in the Silk or Seams. 2dly. +To prevent too precipitate a Fall+. [Sidenote: 2ndly. Caution against too precipitate a Fall.] 15. 1st. Tye, or compress the Mouth of the Balloon, for a Moment; which must always be opened, on observing that the Balloon is again risen to so great a Height as to _strain_, or be distended as above mentioned.