File:San Francisco water (1925) (14781443844).jpg

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English:

Identifier: sanfrancwat4192581930spri (find matches)
Title: San Francisco water
Year: 1922 (1920s)
Authors: Spring Valley Water Company (San Francisco, Calif.)
Subjects: Water-supply
Publisher: San Francisco, Calif. : Spring Valley Water Co.
Contributing Library: San Francisco Public Library
Digitizing Sponsor: California State Library Califa/LSTA Grant

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ds its own level(see Pliny, Hist. Nat. xxxi. 57, subit alti-tudinem exortus sui), and took full ad-vantage of it in the construction of loftyfountains and the supplying of the upperfloors of houses. That they built aqueductsacross valleys in preference to carryingpipes underground was due simply toeconomy. Pipes had to be made of leadwhich was weak, or of bronze which wasexpensive; and the Romans were not suffi-ciently expert in the casting of large pipeswhich would stand a very great pressure toemploy them for the whole course of a greataqueduct. Secondly, the water was so ex-tremely hard that it was important that thechannels should be readily accessible for re-pair as well as for the detection of leakage.Moreover, the Roman aqueducts did not, infact, preserve a straight line regardless ofthe configuration of the country. A strikingexample is the aqueduct of Nemausus(Nimes), the springs of which are some tenmiles from the town, (Continued on page 14) SAN FRANCISCO WATER January, 192
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itiit-tj t • •

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https://www.flickr.com/photos/internetarchivebookimages/14781443844/

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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.
Volume
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1925
Flickr tags
InfoField
  • bookid:sanfrancwat4192581930spri
  • bookyear:1922
  • bookdecade:1920
  • bookcentury:1900
  • bookauthor:Spring_Valley_Water_Company__San_Francisco__Calif__
  • booksubject:Water_supply
  • bookpublisher:San_Francisco__Calif____Spring_Valley_Water_Co_
  • bookcontributor:San_Francisco_Public_Library
  • booksponsor:California_State_Library_Califa_LSTA_Grant
  • bookleafnumber:187
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014



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30 September 2015

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