div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=university-of-wisconsina-supporting-the-mass-copper-and-ladders-for-ascendinghtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: University of Wisconsin–MadisonimageslibrarywisceduWIEFacsWILocHistsHistColumbreference… · supporting the mass copper and ladders for ascending and descending the pits loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentsnetreader035viewer20220709085f8b53be972bcd5d3e74b5b4html5thumbnails1jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=university-of-wisconsina-supporting-the-mass-copper-and-ladders-for-ascendinghtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: University of Wisconsin–MadisonimageslibrarywisceduWIEFacsWILocHistsHistColumbreference… · supporting the 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copper and ladders for ascending and descending the pits loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentsnetreader035viewer20220709085f8b53be972bcd5d3e74b5b4html5thumbnails5jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=6Page 6button div class=ts-imageimg data-url=university-of-wisconsina-supporting-the-mass-copper-and-ladders-for-ascendinghtmlpage=6 data-page=6 class=ts-thumb lazyload alt=Page 6: University of Wisconsin–MadisonimageslibrarywisceduWIEFacsWILocHistsHistColumbreference… · supporting the mass copper and ladders for ascending and descending the pits loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentsnetreader035viewer20220709085f8b53be972bcd5d3e74b5b4html5thumbnails6jpg width=140 height=200 divdivdiv 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