File:La verrerie depuis les temps les plus reculés jusqu'à nos jours (1869) (14778843864).jpg

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Identifier: laverreriedepuis00sauz (find matches)
Title: La verrerie depuis les temps les plus reculés jusqu'à nos jours
Year: 1869 (1860s)
Authors: Sauzay, A. (Alexandre), 1804-1870 Cavagna Sangiuliani di Gualdana, Antonio, conte, 1843-1913, former owner. IU-R
Subjects: Glass Glassware Glass manufacture Glass craft Decoration and ornament Glass painting and staining Mirrors Optical glass Optical instruments Eyes, Artificial Glass beads
Publisher: Paris : L. Hachette & Cie
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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lanterne magique, dans une chambretotalement obscure, on obtient les rayons solaires enadaptant le microscope à lune des fenêtres, garnie dunvolet en bois dans lequel on a ménagé une très-petiteouverture correspondant à la lentille placée dans le tube.A lextérieur de la fenêtre se trouve un miroir qui, rece-vant les rayons solaires, les réfléchit vers une lentille con-vergente et de là sur une deuxième lentille qui, formantfoyer (de là son nom focus2), les concentre. 1 Cette observation sapplique fà tous les travaux microscopiques. 2 Mot latin : feu, foyer. 270 LES MERVEILLES DE LA VERRERIE. Lobjet à examiner se place entre deux lames de verreadhérentes au moyen dun ressort à boudin. Malgré les phénomènes quil produit, et dont nous dironstout à lheure quelques mots, le microscope solaire pré-sente plusieurs inconvénients. Le premier est 1 instabilitéde la lumière du soleil qui, malgré linclinaison que londonne au miroir au moyen dune vis de rappel, ne permet
Text Appearing After Image:
Fig. 58. — Microscope solaire. souvent pas de terminer une opération. Le second setrouve dans la concentration sur lobjet dune chaleurtelle que lobjet à examiner saltère promptement. On remédie en partie à ce dernier défaut en plaçantdevant lobjet une couche deau saturée dalun; cettesubstance étant diathermane, laisse passer la lumière sansêtre traversée par la chaleur. Ayant mentionné les défectuosités inhérentes à linstru-ment, nous serions ingrat si nous omettions de citerquelques-unes des merveilles quil produit. Sa puissance OPTIQUE. 271 est telle, que, grâce à son secours, on a pu étudier la cir-culation du sang dans la queue des têtards (larves de lagrenouille) ainsi que dans les pattes des grenouilles, lesanimalcules invisibles à lœil qui se trouvent dans le vi-naigre, la pâte de farine, leau, et enfin la cristallisationdes sels. MICROSCOPE PHOTO-ELECTRIQUE La construction et les résultats de ce nouveau microscopeétant identiquement les mêmes que c

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  • bookid:laverreriedepuis00sauz
  • bookyear:1869
  • bookdecade:1860
  • bookcentury:1800
  • bookauthor:Sauzay__A___Alexandre___1804_1870
  • bookauthor:Cavagna_Sangiuliani_di_Gualdana__Antonio__conte__1843_1913__former_owner__IU_R
  • booksubject:Glass
  • booksubject:Glassware
  • booksubject:Glass_manufacture
  • booksubject:Glass_craft
  • booksubject:Decoration_and_ornament
  • booksubject:Glass_painting_and_staining
  • booksubject:Mirrors
  • booksubject:Optical_glass
  • booksubject:Optical_instruments
  • booksubject:Eyes__Artificial
  • booksubject:Glass_beads
  • bookpublisher:Paris___L__Hachette___Cie
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:281
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014


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