File:L'art de fortifier, de defendre, et d'attaquer les places - suivant les methodes françoises, hollandoises, italiennes and espagnoles, le tout enrichy de figures en taille douce (1677) (14804556133).jpg

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Identifier: lartdefortifierd00dech (find matches)
Title: L'art de fortifier, de defendre, et d'attaquer les places : suivant les methodes françoises, hollandoises, italiennes & espagnoles, le tout enrichy de figures en taille douce
Year: 1677 (1670s)
Authors: Dechales, Claude-François Milliet, 1621-1678
Subjects: Fortification Military art and science
Publisher: A Paris : Chez Estienne Michallet ...
Contributing Library: Getty Research Institute
Digitizing Sponsor: Getty Research Institute

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ftla quatrième partie de EF, ) li vous re-gardez les Tables des Sinus, & fî vous fai-«tes comme E Fj à F I ^ ainfî le Sinus totalà un quatrième -, vous trouverez que lAn-gle I £ F eft de quatorze degrez^ & troismin. Or dans le Qu^arré, lAngle de De-nii-gorge ABL etl de cent trente-cinqdegrcz : donc, dans le Triangle ALB,puifque lAngle L E B eft de quatorze ,A B L de 135. -, la fomme eft de centquarante-neuf j laquelle eftant fouftraitede cent quatre-vingt, donnelAngle AL&de trente & un ^ 6c le doublant, vous au-rez \ Angle flanqué I L O de foixante &deux. On pourroit un peu aggrandir leflanc, ou prendre un peu de feu fur laCourtine , & lAngle flanqué deviendroitde foixante degrés , ce qui eft afles pour leQuarré. La Courtine fe trouve de foixanteèc dotize toifes , & la face de quarante-cinq , qui eft une proportion fort raifon-nable , donc cette façon na rien q;ai foitcontre les Reoles.XiS ^7t Dciïionfti,itiûn du Pentagone. Je prou^j Pa^iog
Text Appearing After Image:
Livre fécond. lO^ vc aufîi que cette façon de fortifier lepentagone, eft félon les Règles. Première-ment y les Demi-gorges Ôc les flancs ontchacun dix-huit toifes *, lAngle flanqué efl:de quatre-vingt degrez : car lAngle BELeftant de e;uatorze degrés, trois minutes ,èc lAngle A B L eftant dans le Pentagonede cent vingt-fix, la fomme eft de centquarante , laquelle eftant oftée de centquatre-vingt, donneTAngle BLE de qua-rante, & lAngle flanqué total de quatte-vingt. Il eft donc aftezFort. La face fe trou-ve un peu plus grande que la moitié de laCourtme , ce qui neft pas defeâ:ueux. Que il on le vouloit contenter de foi-xantc & quinze, ou (oixante & dix degréspourlAngle flanqué , onpourroitprendreun petit flanc fur la Counine, ou aggran-dir le flanc dune ou deux toiles. PROPOSITION IX. Fortifier à U Franfoife u» Hexagont, fj* toHs les autres Polygones qnt font fiti de^Hs, Quon propofe lHexagone ABC ^ fig^^s.fortifier à laFrançoife. Divifez com-me deffus,

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Flickr tags
InfoField
  • bookid:lartdefortifierd00dech
  • bookyear:1677
  • bookdecade:1670
  • bookcentury:1600
  • bookauthor:Dechales__Claude_Fran__ois_Milliet__1621_1678
  • booksubject:Fortification
  • booksubject:Military_art_and_science
  • bookpublisher:A_Paris___Chez_Estienne_Michallet____
  • bookcontributor:Getty_Research_Institute
  • booksponsor:Getty_Research_Institute
  • bookleafnumber:161
  • bookcollection:getty
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014



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