Paper, 'De imaginibus pyramidatibus' [On pyramidate figures] by unknown author Paper and diagrams relating to anamorphosis, which had been of interest to artists since the sixteenth century. Various rules for creating anamorphic images may be found, for example, in Jean-François Nicéron's Thaumaturgus opticus, sive amiranda optices (1646). Includes a page on 'Imagines speculares quae videntur in cylindro' [Images as they appear in mica cylinders]. Four diagrams present in text. Subject: Mathematics / Natural philosophy [17th century]