The article "Involutometry Illustrations" appeared in the November/December 1988 issue of Gear Technology.
In our last issue, the labels on the drawings illustrating "Involutometry" by Harlan Van Gerpan and C. Kent Reece were inadvertently omitted. For your convenience we have reproduced the corrected illustrations here. We regret any inconvenience this may have caused our readers.
The article "Involutometry Illustrations" should appear in the box below, but if you do not see it, you can download it here.