div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: · Bowens Reaction Series I: Bowenss Reaction Series JOURNAL OF GEOLOGY April-May 1922 THE REACTION PRINCIPLE IN PETROGENESIS src=https:reader031vdocumentsusreader031viewer20220218115c8812a709d3f2bc6b8ca1e9html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv