Problems of the Libyan Desert (Registro nro. 117813)
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| fixed length control field | 03078cam a22003373u 4500 |
| 001 - CONTROL NUMBER | |
| control field | 77091 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | UtSlPG |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260610134803.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS | |
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| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION | |
| fixed length control field | cr n |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 260607r20251927utu|||||o|||||||||||||| d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | UtSlPG |
| 041 #7 - LANGUAGE CODE | |
| Language code of text/sound track or separate title | en |
| Source of code | iso639-1 |
| 050 #4 - LIBRARY OF CONGRESS CALL NUMBER | |
| Classification number | DT |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Ball, John, |
| Dates associated with a name | 1872-1941 |
| 245 10 - TITLE STATEMENT | |
| Title | Problems of the Libyan Desert |
| 264 #1 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Place of production, publication, distribution, manufacture | Salt Lake City, UT : |
| Name of producer, publisher, distributor, manufacturer | Project Gutenberg, |
| Date of production, publication, distribution, manufacture, or copyright notice | 2025 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 1 online resource : |
| Other physical details | multiple file formats |
| 336 ## - CONTENT TYPE | |
| Content type term | text |
| Content type code | txt |
| Source | rdacontent |
| 337 ## - MEDIA TYPE | |
| Media type term | computer |
| Media type code | c |
| Source | rdamedia |
| 338 ## - CARRIER TYPE | |
| Carrier type term | online resource |
| Carrier type code | cr |
| Source | rdacarrier |
| 490 1# - SERIES STATEMENT | |
| Series statement | Produced from The Geographical Journal, v. 70, 1927. |
| 500 ## - GENERAL NOTE | |
| General note | Release date is 2025-10-20 |
| 508 ## - CREATION/PRODUCTION CREDITS NOTE | |
| Creation/production credits note | Galo Flordelis (This file was produced from images generously made available by the HathiTrust Digital Library) |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | "Problems of the Libyan Desert" by John Ball is a scientific publication written in the early 20th century. It synthesizes exploration, surveying, and geology to explain the Libyan Desert’s great depressions, artesian waters, dunes, and rumored “lost” oases, while evaluating whether basins like Qattara and Wadi Rayan could be harnessed for irrigation, drainage, or power. The work also challenges persistent myths—most notably that a former Nile branch crossed the western desert—by using new contour mapping and hydrological reasoning. The opening of the work lays out a dozen central questions about the region and explains how recent triangulation and improved barometric leveling enabled a first, provisional contoured map. It lists a chain of sub‑sea‑level basins culminating in the vast, newly confirmed Qattara Depression, outlines the major escarpments and highlands (Gilf Kebir, Oweinat, Kissu), and uses these data to dismiss the old “dry river” idea of a Nile branch to the Mediterranean. The author attributes the depressions chiefly to wind erosion acting on soft strata breached through structural weaknesses, illustrating a subtle deepening mechanism observed in coastal “bosom” basins, and then weighs engineering schemes: Wadi Rayan as a sump looks plausible, while a Qattara sea and hydropower face prohibitive topography and cost. He traces the artesian system to the Erdi–Ennedi highlands, derives static water‑level contours from wells and lakes, explains the persistence of desert lakes via underground inflow, and notes the Nile’s capture of warm artesian water near Dakka. From these contours he rejects deep coastal artesian wells, warns that well interference and external drains may lower oasis heads, and begins to test traditions about “Zerzura” against the new topographic and hydrologic evidence. (This is an automatically generated summary.) |
| 534 ## - ORIGINAL VERSION NOTE | |
| Introductory phrase | Originally published: |
| Publication, distribution, etc. of original | London: The Royal Geographical Society, 1927 |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Libyan Desert |
| 830 #0 - SERIES ADDED ENTRY--UNIFORM TITLE | |
| Uniform title | Produced from The Geographical Journal, v. 70, 1927. |
| 856 4# - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://babel.hathitrust.org/cgi/pt?id=uc1.230921">https://babel.hathitrust.org/cgi/pt?id=uc1.230921</a> |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://www.gutenberg.org/ebooks/77091">https://www.gutenberg.org/ebooks/77091</a> |
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