ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] THE matter in this book is confined chiefly to tunnels and adits for mining purposes, and includes also those used to carry water for power, irrigation, and domestic use. Such tunnels are driven generally through fairly hard rock. Some cross-sections of typical tunnels are given, and extensive ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/094476a0