Cutaway drawing of a church bell, showing construction.  Alterations: none
William Henry Stone
1879
Downloaded from <a rel="nofollow" class="external text" href="https://books.google.com/books?id=B_s4AAAAMAAJ&amp;pg=PA32">William Henry Stone (1879) <i>Elementary Lessons on Sound</i>, Macmillan &amp; Co., London, p.32, fig.15</a> on Google Books