Mixed media (ink, graphite, colored pencil) on card stock. The illustration entitled, “Fig. 1: Diagram of Normal Valsalva Maneuver" features a rough draft of a diagram with a normal response to the valsalva manuever with special instructions directed to the artist. It appeared in The Heart Bulletin November-December 1961 issue on page 112. There are publication markings. The reverse side has publication markings.

Mixed media (ink, graphite, colored pencil) on card stock. The illustration entitled,“Fig. 2: Diagram of Abnormal ('square wave') response to the Valsalva Maneuver” features a rough draft of a diagram of an abnormal response to the valsalva manuever with special instructions directed to the artist. It appeared in The Heart Bulletin November-December 1961 issue on page 113. There are publication markings. The reverse side has publication markings.