File:Scientific American Volume 86 Number 14 (April 1902) (1902) (14587305260).jpg

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Description
English:

Identifier: scientific-american-1902-04-05 (find matches)
Title: Scientific American Volume 86 Number 14 (April 1902)
Year: 1902 (1900s)
Authors:
Subjects: feet scientific tion steam electric automobile tbe patent union pacific scientific american gas engine foreign trade sewing machine long island maximum grade glass palace wireless telegraphy lifting power
Publisher:

View Book Page: Book Viewer
About This Book: Catalog Entry
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Tunnel.
Text Appearing After Image:
L/vc-cr West Mall or Tumhei.PLAN VIEW OF CAVE-IN, SHOWING CRATER ANB BULKHEABS. PROFILE OF THE EASTERLY TUNNEL, SHOWING PRESENT STATE OF THE WORK. heading to the street level is, therefore, 48 feet. Ingeneral, the solid rock in which the tunnel lies ex-tends nearly to the surface of Park Avenue; but be-tween 37th and 38th Streets there is a depression orbasin in the rock, and its surface lies, as indicated inour drawing, about 28 feet below the surface of thestreet, or about 20 feet above the roof of the tunnelheading. Above the rocklies a mass of what Va.iengineers call earth, thatis to say, a loose materialconsisting of gravel, sand,clay, etc., of a consistencywhich can be easily exca-vated by pick and shovel,and which has no naturalcohesion to hold it inplace. On the Wednesday pre-ceding the day on whichthe trouble occurred, itwas noticed that therewere indications of settle-ment of the rock, and asection of rock measuringabout 3x6 feet fellthrough into the tunnel.An examination of

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https://www.flickr.com/photos/internetarchivebookimages/14587305260/

Author Internet Archive Book Images
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Flickr tags
InfoField
  • bookid:scientific-american-1902-04-05
  • bookyear:1902
  • bookdecade:1900
  • bookcentury:1900
  • booksubject:feet
  • booksubject:scientific
  • booksubject:tion
  • booksubject:steam
  • booksubject:electric
  • booksubject:automobile
  • booksubject:tbe
  • booksubject:patent
  • booksubject:union_pacific
  • booksubject:scientific_american
  • booksubject:gas_engine
  • booksubject:foreign_trade
  • booksubject:sewing_machine
  • booksubject:long_island
  • booksubject:maximum_grade
  • booksubject:glass_palace
  • booksubject:wireless_telegraphy
  • booksubject:lifting_power
  • bookcontributor:
  • booksponsor:
  • bookleafnumber:4
  • bookcollection:scientific-american-1845-1909
  • bookcollection:magazine_rack
  • bookcollection:additional_collections
Flickr posted date
InfoField
29 July 2014

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