Constructing volvelles

As Elizabeth Bruxer correctly identified within a few short hours of its posting, this month’s crocodile mystery showed the inner disc of an unconstructed volvelle from a copy of the 1591 edition of Giambattista della Porta’s De furtivis literarum  notis (STC 20118). The key to her identification lay in recognizing the image as being part of a […]

Volvelles

As three of you immediately identified in your comments, last week’s crocodile mystery was the fastening in the center of a volvelle, holding the various layers in place and allowing them to turn: Volvelles are paper wheels that are fastened to a leaf so that the discs spin independently. Some of the earliest volvelles were […]