div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Take a one-inch-wide ribbon for instance With each turn of the spool the ribbon must move one inch across the spool surface But what happens if the ribbon varies in src=https:reader034vdocumentsusreader034viewer20220422015ea17f31c23af104b66aa75fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: Take a one-inch-wide ribbon for instance With each turn of the spool the ribbon must move one inch across the spool surface But what happens if the ribbon varies in src=https:reader034vdocumentsusreader034viewer20220422015ea17f31c23af104b66aa75fhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: Take a one-inch-wide ribbon for instance With each turn of the spool the ribbon must move one inch across the spool surface But what happens if the ribbon varies in src=https:reader034vdocumentsusreader034viewer20220422015ea17f31c23af104b66aa75fhtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdiv