Caverni, Raffaello, Storia del metodo sperimentale in Italia, 1891-1900

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                <pb xlink:href="020/01/1001.jpg" pagenum="444"/>
              dietro alle lucide apprensioni della fantasia, nè l'esser que'disegni condotti
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              nel margine della carta 68 del T. V, P. III de'Manoscritti galileiani, dove
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                <figure id="id.020.01.1001.1.jpg" xlink:href="020/01/1001/1.jpg" number="155"/>
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            <p type="caption">
              <s>Figura 89.
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                <figure id="id.020.01.1001.2.jpg" xlink:href="020/01/1001/2.jpg" number="156"/>
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              <s>Figura 90.
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              son calcoli rela­
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              tivi alle Medicee,
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              è argomento cer­
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              to che si voglia in
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              quel modo raffi­
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              gurar l'aspetto
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              propriamente di
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              Giove, macomun­
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              que sia, abbiam
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              sopra quelle figure voluto richiamar l'attenzione de'nostri Lettori, se cre­
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              dessero di servirsene come argomento da rispondere all'Arago, il quale si
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                <figure id="id.020.01.1001.3.jpg" xlink:href="020/01/1001/3.jpg" number="157"/>
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              <s>Figura 91.
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              maravigliava che Galileo non abbia fatta men­
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              zione mai delle Macchie gioviali, e domandava
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              con ghigno maliziosetto se “ les bandes n'aura­
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              ient-elles pas existé du temps de cet immortal
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              observateur. </s>
              <s>” </s>
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              <s>Di quelle zone la Maestà di Giove si sarà
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              precinti i fianchi, infin da quando salì sul suo
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              trono reale, ma per vederle sotto quella distinta
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              figura ci bisognavano strumenti un poco più perfetti di quelli fabbricati da
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              Galileo. </s>
              <s>Francesco Fontana nel 1630 (Novae Observ., 1646, pag. </s>
              <s>110) fu primo
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              co'suoi Canocchiali a notare una tal novità, ma dubitò non forse dovesse
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              “ crystalli vitio id accidere ” (pag. </s>
              <s>107). Il Castelli in Roma vide due anni
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              dopo la stessa cosa, ma nemmen egli ne aveva certezza. </s>
              <s>Intanto però l'Ot­
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              tico napoletano, per dar credito alla fabbrica, divulgò la notizia che co'suoi
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              nuovi Canocchiali vedevasi Giove “ fasciolis duabus ambitus ” (pag. </s>
              <s>110). </s>
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              <s>Giunse quella voce, circa il 1640, alle orecchie del Granduca in Pisa,
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              dove ne tenne discorso col Renieri, a cui sovvenne poco dopo un arguto
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              pensiero di servirsi delle mutazioni che avrebbero dovuto far quelle fasce,
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              come di nuovo argomento a confermar la verità del Sistema copernicano. </s>
              <s>Ne
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              scrisse in proposito al principe Leopoldo, supposto che fosse stata verificata
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              la notizia venuta di Napoli, ma il Principe rispose che, non essendosi po­
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              tute vedere in Firenze quelle fascie gioviali, dubitava se l'osservazione degli
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              Astronomi napoletani
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              fosse stata fatta bene
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              (Alb. </s>
              <s>V, 368). </s>
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              <s>In ogni modo, nel 1642 il Renieri medesimo si assicurò di ogni dub­
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              bio e lasciò nota a carte 53 de'suoi Manoscritti raccolti nel T. VI della
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              P. III insieme co'galileiani, dicendo di aver co'suoi proprii occhi ve­
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              duto veramente Giove “ fasciolis duabus ambitus ” (Alb. </s>
              <s>V, 366) come ave­
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              vano dato a intendere le voci venute di Napoli. </s>
              <s>L'anno appresso se ne as­
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              sicurò pure anche il Fontana, il quale anzi vide Giove non più “ duabus,
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              sed tribus fasciolis cinctus ” (Observ. </s>
              <s>cit., pag. </s>
              <s>112) e si persuase “ eas
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              vere in ipso Jovis corpore esse ” (ibi, pag. </s>
              <s>107) e non un illusione ottica </s>
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