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calculated that the air in the sphere would weigh 290 kg (638 lb), and would provide enough lift to carry 6 passengers. At the time no one could manufacture such thin copper foil and the pressure of the surrounding air would have collapsed the spheres. In addition, Francesco Lana de Terzi was aware that one could use such a vehicle as a weapon of war, and attack cities from the air. He wrote: “
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479:"An accompt of two books. - I. Prodromo overo saggio di alcune inventioni nuove premesso all'Arte Maestra di P. Francisco Lana della Campagnia di Jesu, in Brescia, 1670. in 4Ëš. II Joh. Henr. Meibomii de cerevisiis, potibĂąsque & ebriaminibus extra vinum aliis Commentarius, annexo libello Turnebi de vino. Helmestadii 1668. in 4Ëš"
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Prodromo ovvero saggio di alcune inventione nuove premesso all'arte
Maestra Opera che prepara il P. Francesco Lana, Bresciano della Compagnia di Giesu. Per mostrare li piĂą reconditi proncipij della Naturale Filosofia, riconosciuti con accurata Teorica nelle piĂą segnalate inventioni, ed isperienze
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inside, and so being lighter than the surrounding air, would provide lift. The airship would be steered like a sailing boat. Each sphere would have had a diameter of 7.5 m (24 ft 7 in). Terzi calculated that the weight of a sphere would be 180 kg (396 lb). He also
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people of his own invention. Unlike previous blind writing systems, Lana's alphabet was based on the idea that it did not have to mimic the regular handwritten or printed letters, but had to be based on signs (dashes) that could be recognized by the
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in which letters of the alphabet are translated into musical notes. Although primarily intended for sending secret messages hidden via sheet music, the resulting melody could be transmitted by ear, and thus would also be accessible to the blind.
334:"Reflections Made by P. Francisco Lana S. F. upon an Observation of Signor M. Antonio Castagna, Super Intendent of Some Mines in Italy, Concerning the Formation of Crystals: English'd Out of the XI. Venetian Giornale de Letterati"
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God will never allow that such a machine be built…because everybody realises that no city would be safe from raids…iron weights, fireballs and bombs could be hurled from a great height
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His design had a central mast to which a sail was attached, and four masts which had thin copper foil spheres attached to them: the air would be pumped out of the spheres, leaving a
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of one's fingers. The one detail which prevented the success of this invention is that Lana failed to understand that dots were more easily recognizable than
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field into a science by establishing "a theory of aerial navigation verified by mathematical accuracy". He also developed the idea that developed into
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and recent advances in its production may render this conclusion obsolete. A model of Lana de Terzi's invention is on display at the
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made this fundamental intuition and devised the blind writing alphabet that was named after him.
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and has been referred to as the Father of
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fin'hora ritrovate da gli scrittori di questa materia & altre nuove dell'autore medesimo
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422:(in Latin). Vol. 3. Parma: Typis Hyppoliti Rosati ac sumptibus Iosephi ab Oleo.
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The fact that these vacuum spheres were physically impossible was proven in 1710 by
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In the year 1670, Francesco Lana de Terzi published a book titled
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Francesco Lana, visionario tra velivoli e l'alfabeto dei ciechi
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411:(in Latin). Vol. 2. Brescia: per Io. Mariam Ricciardum.
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saggio di alcune invenzioni nuove premesso all'arte maestra
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Magisterium naturae, et artis. Opus physico-mathematicum
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Magisterium naturae, et artis. Opus physico-mathematicum
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Magisterium naturae, et artis. Opus physico-mathematicum
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Francesco Lana de Terzi's design for a flying boat, 1670
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545:"Ready for Takeoff. Robert Hooke's flying experiments"
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Francesco Lana de Terzi's flying boat concept c.1670
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258:(1671). In 1671, a review by
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491:(69): 2114–2118. 1671.
256:Hypothesis physica nova
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