The Collation

Research and Exploration at the Folger

Posts Tagged: volvelle

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… Continue Reading »


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… Continue Reading »