div class=trans-pagebuttonPage 1button div class=trans-image a href=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5page1jpg target=_blank amp-img class=trans-thumb 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 src=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=trans-pagebuttonPage 2button div class=trans-image a href=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5page2jpg target=_blank amp-img class=trans-thumb 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 src=https:reader042fdocumentsinreader042viewer20220226075b8448857f8b9a317e8b9d51html5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divdiv