Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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                  Corol. </s>
                  <s>7, Prop.XXXV. </s>
                  <s>In motibus tardis reſiſtentia poteſt eſſe pau­
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                  lo minor, propterea quod figura Globi paulo aptior ſit ad motum
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                  quam figura Cylindri eadem diametro deſcripti. </s>
                  <s>In motibus ve­
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                  locibus reſiſtentia poteſt eſſe paulo major, propterea quod elaſti­
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                  citas & compreſſio fluidi non augeantur in duplicata ratione ve­
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                  locitatis. </s>
                  <s>Sed hujuſmodi minutias hic non expendo. </s>
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                  DE MOTU
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                  CORPORUM</s>
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                  <s>Et quamvis Aer, Aqua, Argentum vivum & ſimilia fluida, per
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                  diviſionem partium in infinitum, ſubtiliarentur & fierent Media in­
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                  finite fluida; tamen globis projectis haud minus reſiſterent. </s>
                  <s>Nam
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                  reſiſtentia, de qua agitur in Propoſitionibus præcedentibus, oritur
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                  ab inertia materiæ; & inertia materiæ corporibus eſſentialis eſt &
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                  quantitati materiæ ſemper proportionalis. </s>
                  <s>Per diviſionem partium
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                  fluidi, reſiſtentia quæ oritur a tenacitate & frictione partium, di­
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                  minui quidem poteſt: ſed quantitas materiæ per diviſionem par­
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                  tium ejus non diminuitur; & manente quantitate materiæ, manet
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                  ejus vis inertiæ cui reſiſtentia, de qua hic agitur, ſemper proportio­
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                  nalis eſt. </s>
                  <s>Ut hæc reſiſtentia diminuatur, diminui debet quantitas
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                  materiæ in ſpatiis per quæ corpora moventur. </s>
                  <s>Et propterea ſpa­
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                  tia Cœleſtia, per quæ globi Planetarum & Cometarum in omnes
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                  partes liberrime & abſque omni motus diminutione ſenſibili per­
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                  petuo moventur, fluido omni corporeo deſtituuntur, ſi forte vapo­
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                  res longe tenuiſſimos & trajectos lucis radios excipias. </s>
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                  <s>Projectilia utique motum cient in fluidis progrediendo, & hic
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                  motus oritur ab exceſſu preſſionis fluidi ad projectilis partes anti­
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                  cas ſupra preſſionem ad ejus partes poſticas, & non minor eſſe po­
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                  teſt in Mediis infinite fluidis quam in Aere, Aqua, & Argento vivo
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                  pro denſitate materiæ in ſingulis. </s>
                  <s>Hic autem preſſionis exceſſus,
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                  pro quantitate ſua, non tantum motum ciet in fluido, ſed etiam agit
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                  in projectile ad motum ejus retardandum: & propterea reſi­
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                  ſtentia in omni fluido, eſt ut motus in fluido a projectili excita­
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                  tus, nec minor eſſe poteſt in Æthere ſubtiliſſimo pro denſitate
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                  Ætheris, quam in Aere, Aqua, & Argento vivo pro denſitatibus
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                  horum fluidorum. </s>
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