<a href="https://en.wikipedia.org/wiki/Anglesite" class="extiw" title="en:Anglesite">en:Anglesite</a> specimen - <a href="https://en.wikipedia.org/wiki/Project_Gutenberg" class="extiw" title="en:Project Gutenberg">en:Project Gutenberg</a> eText 13600 - <a rel="nofollow" class="external free" href="http://www.gutenberg.net/dirs/1/3/6/0/13600/13600-h/13600-h.htm">http://www.gutenberg.net/dirs/1/3/6/0/13600/13600-h/13600-h.htm</a> -
<a href="https://en.wikipedia.org/wiki/Encyclop%C3%A6dia_Britannica_Eleventh_Edition" class="extiw" title="en:Encyclopædia Britannica Eleventh Edition">Encyclopedia Britannica 11th edition</a>, published in 1911. Originally from <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>; description page is/was <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Image%3AAnglesite_specimen_-_Project_Gutenberg_eText_13600.png">here</a>. Vectorized by <a href="//commons.wikimedia.org/wiki/User:Remember_the_dot" title="User:Remember the dot">Remember the dot</a>.