AEROSTATICAL • FREE-TRANSLATOR.COM • Definition of Aerostatical

... have crossed the Cordilleras of the Andes say, that situations have been explored among their points in South America, where those senses have been found to suffer a temporary suspension. Our voyageurs aeriens[Footnote: Our aerostatic travellers] may now be useful to settle that question among others, and Pambamarca's ...

— Observations and Reflections Made in the Course of a Journey through France, Italy, and Germany, Vol. I • Hester Lynch Piozzi

... explanations. Generally, the flying objects are divided into four groups: Flying disks, torpedo or cigar-shaped bodies with no wings or fins visible in flight, spherical or balloon-shaped objects and balls of light. The first three groups are capable of flight by aerodynamic or aerostatic means and can be propelled and controlled by methods known to aeronautical engineers. As for the lights, their actions—unless they were suspended from a higher object or were the product of hallucination—remain unexplained. Eventually, reports are ...

— The Flying Saucers are Real • Donald Keyhoe