id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
39785	Vogel, Robert M.	Tunnel Engineering: A Museum Treatment			.txt	text/plain	14293	821	63	iron lining, and a movable shield in a subaqueous tunnel at the end air, iron lining, and a movable shield in a subaqueous tunnel at the major tunneling work in the United States. [Illustration: Figure 5.--BURLEIGH ROCK DRILL, improved model of about Latrobe stated the basic philosophy of rock-tunnel work. the first workable application of machine rock drilling to tunneling. progress of the tunnel itself, before and after use of the air drills. [Illustration: Figure 12.--WORKS AT THE CENTRAL SHAFT, HOOSAC TUNNEL, followed up by permanent masonry arching and lining in tunnel work. In that year, work was started on a tunnel under the Thames between work of any period is Henry Law's _A Memoir of the Thames Tunnel_, tunneling work, and then, as with the shield ten years earlier, almost support for large-area tunnel works in unstable ground, and this remains the only major subaqueous tunnel work driven with air alone.	./cache/39785.txt	./txt/39785.txt