1892: bison skulls await industrial processing at Michigan Carbon Works in Rogueville (a suburb of Detroit). Bones were used processed to be used for glue, fertilizer, dye/tint/ink, or were burned to create "<a href="https://en.wikipedia.org/wiki/bone_char" class="extiw" title="w:bone char">bone char</a>" which was an important component for sugar refining.
Unknown author<span style="display: none;">Unknown author</span>
Burton Historical Collection, Detroit Public Library