I am deeply grateful for the privilege of presenting this process of micro-fossil washing, because it is a long step toward perfection in micropaleontology. With the speed and efficiency with which micro-fossils can now be removed from shales which were heretofore considered too hard to be worked, a whole new era lies before us.
Proceedings of the Iowa Academy of Science
©1951 Iowa Academy of Science, Inc.
Campbell, Carlyle B.
"The Campbell Micro-Fossil Washer,"
Proceedings of the Iowa Academy of Science, 58(1), 275-277.
Available at: https://scholarworks.uni.edu/pias/vol58/iss1/31