* Fig 1 corresponds to: George Holland: Patent for making Fleecy Hofiery.
<ul><li>Fig 2 corresponds to: Richard Weston: Description of a Steam-Flue for Hot-beds.</li>
<li>Fig 3 corresponds to: Nicholas Collin: Description of a Speedy Elevator.</li>
<li>Fig 4 corresponds to: Nicholas Collin: Drawing of a Machine for saving Persons from the upper Stories of a House on fire.</li></ul>
George Holland, Richard Weston, Nicholas Collin
<i>The Repertory of Arts and Manufactures</i>. Volume 15, G. &amp; T. Wilkie, 1801, Plate III, <a rel="nofollow" class="external text" href="https://books.google.de/books?id=69scAQAAMAAJ&amp;hl=de&amp;pg=PA40#v=onepage&amp;q&amp;f=false">p. 40</a>