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) (14784731185).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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zante FH : vous tirerez aufli GH, prenantgarde queftant prolongée elle aboutiiïeau poind L, qui eft le bout de la demi^gorge AL, égale à BE : car iî elleaboutif-Ibit iculement en A, il faudroit faire quel-que changement , comme de tirer dupoinâ: L une Perpendiculaire à FH pro-longée : ce qui peut-eRce retrancheroitquelques toiles du flanc EG, ceft pour-quoy il faudroit remarquer file flanc quircfteroit feroit aflez grand. Agiflèz de mefme façon fur tous les au-tres Angles de la fisiure , 6c vous aurez vo-ftre fortiiication entière. Je ne mets pasla démonstration , puiiquil eft évident queceft la méthode Françoife. PROPOSITION III. Jlïethode de fortifier à deje^p fichante unefigtire trreguliere bien conditionnée. ÎL faut remarquer que toutes fortesdAngles &: de Coftez nefe peuvent pasfortifier à Défenfe fichante. Première-ment , tout Angle qui neft gueres plusgrand que celuy du Pentagone , qui cftde cent hait degrcz, ne fe peut fortifier 3 6 Flanche 2l^ QjÔ g
Text Appearing After Image:
Livre ^mtri/nft. ^6^ qu à Défenfe razante. Les codez auflîtropcourts j de qui ne furpalTent pas cent toiles,ont difficilement un fécond flanc. Suppo-fons donc que Ton veut une Défenfe fi-chante. Ayant, fuivant la figure précéden-te, déterminé les demi-gorges BD , BE, ôcles flancs DF, EG-, coupez les autres de-mi-gorges AL, CK : puis faites que KM,LN foient les troifiémes parties des Cour-tines LE 5 KD. Ayant tiré des lignes parlextrémité des flancs F & G , lopérationfera achevée , pourveu que lAngle H £ctrouve pour le moins de îoixante degrez:car sil eftoit plus petit, vous ne pourricsBfavoir que des Défenfes razantes. Il ■■ ■ I ■ Il II* PROPOSITION IV. Fortifier une figure irregulierè bien condi^ttonnee par un Angle aircEieur. JAy déjà donne le moyen de faire cet P/.3^.Angle diredeur : voyez-en la figure dans A^Piîla planche douzième. Je fuppofe doncquon propofeain Angle B, qui foitdecentquinze degrez, & que les collez AB , BCfoient fort inéga

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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:367
  • bookcollection:getty
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014



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