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) (14784707345).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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nt. Demonftration. Premièrement, larcE G contenant k Demi-angle du Poly- Fv 13 c Traité des Fortificat ions, g^jne, & encore quinze degiez y & lAn-gle EBH cftant Ùl moitié, & KËEcftantégal, lAnj^le total KBH feraauffiégal au Demi-Angle de la circonfeienccaugmenté de quinze dcgrez. Seconde-ment, la Courtine VX égale à HL,consent trois parties, & la face B H encontient deux. Troifiéraement, i AngleQJ)Î P eftant de quarante degrez, lAngleforme-flanc H R V qui luy eft égal ( parla 2-). du /. dEficl. ) fera auffi de quarantedegrez.. Coroli. /. Cette pratique peut ferviren la féconde méthode Hollandoife , fî auJieu dajouter larc F G, on prend larcF H du tiers de E F. Elle peut encore fer-vir pour la troifiéme méthode 5 faifant larcF G de vingt degrez. Coroli. 2. La meime pratique peut auiîîcilre bonne pour la mcthode de Goldman ,qui veut que la Courtine foit double de laface j car il ne faut pour cela, que faire laiignc H L, double de B H, î Tlaivcke- ^^
Text Appearing After Image:
Livre fécond. îji PROPOSITION XXI. TrACerune Fortification HoUmàoifç ^fnr UCofté extérieur. CEtte pratique neft pas différente dela précédente j fî ce neft quelle de- p/^ ,^5.termine le Cofté extérieur. pg,ié^ Qu^on propofe la ligne D B pourdiftance des pomres des Biftions , &que lAngle A B D foit la moitiéde TAngle du Polygone. Décrivez dupoint B, comme centre, larc E F, au-quel vous ajouterez F G de quinze àc^grez : puis ayant divifé larc E G égale-ment en H 5 tirez la ligne B H, ôc fai-tes lAngle BDl égal à DBH. Pre-nez a difcretion la ligne B K, & la dou-blez en BL : prenez auffi BM, triplede BK, & achevez le parallélogrammeB M N L, ou tirant les li-^nes LN, M N Î)aralkLs à BM , BN *, ou prenant aveté compas là ligne B L , &: après avoir misune de (es pointes en M, f.ulant larc N;Pareillcment ayant pris lalik,nc B M , dé-crivez du point L, comme centre , un au-tre arc, qiii coupe le premier tr* N : puistirez la D.agori.le- F. N ., qi 1 c

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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:188
  • bookcollection:getty
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014

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