div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5page1jpg target=_blank img data-url=documentfront-the-scott-arboretum-of-swarthmore-college-concrete-was-composed-of-3htmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: front - The Scott Arboretum of Swarthmore College · Concrete was composed of 3% fly ash a prevents it from pouring into underground in and around the rock-filled drainage loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5page2jpg target=_blank img data-url=documentfront-the-scott-arboretum-of-swarthmore-college-concrete-was-composed-of-3htmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: front - The Scott Arboretum of Swarthmore College · Concrete was composed of 3% fly ash a prevents it from pouring into underground in and around the rock-filled drainage loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5thumbnails2jpg width=140 height=200 adivdiv