Even boring machines can be interesting.
With Big Bertha in the news on a regular basis we got to thinking about boring machines in general. Or rather, interesting boring machines. One in particular comes to mind, from the historic coal mining community of Roslyn, Washington: From Roslyn local historian, Sue Litchfield: Steep-pitched mines predominated the Roslyn-Cle Elum Coal Field, making it more expensive to extract coal than the relatively flat coal seams in the east and Midwest. In an effort to cut costs Tom Murphy the…