| Pounds Averdupois. | |
|---|---|
| Weight of the Aironaut | 160 |
| Provisions and Articles calculated at | 20 |
| Sand-Ballast prepared in Bags | 44 |
| Levity for Ascent | 10 |
| —— | |
| Sum total, | 234 |
[8] Ancient Warriors among the Arabs, Spaniards, Romans, Gauls, and Germans, being frequently obliged to pass deep Rivers, never undertook a Campaign without them. For the above Anecdote, and many curious Experiments on Air, see Sam. Reyheri, Dissertatio de Aëre, tertium edita. Kiliæ. 1673.
[9] Equal Time with a Regulator corrected by an Observation.
[10] Being a Dial-Compass, the Dipping of the Needle was frequently checked by the Glass at the Top. A Mariner’s Compass is the best.
The Defect of the Reel remedied
[12] Slate (according to Cronstedt) is the Whetstone of fine Particles, composed of Glimmer, Quartz; and, in some Species, of a martial argillaceous Earth, See “Essay on Mineralogy” by Mendes Da Costa, Sect. 264.
Method of discovering Haze round the Sun, in bright Weather.