[72]On the Descent of Air in Thunder-Gusts, see “Chalmer’s Account of the Weather in South-Carolina, Vol. 1, Page 1, to 39.”
[73]“Historia Ventorum, Pag. 54, Art. 34.”
[74]Book V. Chapter 2d.
[75]Vol. 1. Page 184.
[76]Page 195.
[77]History of the Canary Isles, Page 252.
[78]As the superior Clouds, during the Balloon Excursion, did not much exceed the Height of 1000 Yards; supposing then the Clouds at an equal Height above the Sea, near Teneriffe; one ought to conclude, either, that the Peak was not so high as Glas represents it; or, that the Level of the Clouds was less than half the Height of the Mountain.
[79]See “Royal Astronomer, by R. Heath, Page 321, on Trade Winds and Monsoons.”
[80]One Pound of Nitre only, producing by mere Heat, 6 cubic Feet of Air. “Cavallo, Page 332, and 811, Experiments on Gun-Powder.”
[81] “See Recherches surles Modifications de l’Atmosphere. No. 715.” Ph. Trans. Part 2, for 1777. Col. Roy’s Experiments, Sect. 2d, Page 689, 744, 753, 764.