[De pollutionibus nocturnis]

Gerson, Jean, 1363-1429, Heinrich, von Langenstein, approximately 1325-1397, attributed name, Heinrich, von Hessen, approximately 1360-1427. Regulae ad cognoscendum peccatum, Fyner, Konrad, active 1472-1488, printer · [Esslingen : Conrad Fyner] · 1 picture

This is a late fifteenth-century Latin treatise on nocturnal emissions, attributed to Jean Gerson and printed at Esslingen by Konrad Fyner around 1472 to 1488 for a clerical and scholarly readership. The only picture is a Boston Public Library ownership device: a laurel wreath enclosing a seated figure, a shield with an open book, two standing nude figures, the motto 'Lux Omnium Civium', and lettering reading 'Of the City of Boston'. A designer could take from it the classic symmetrical wreath-and-shield emblem structure, with balanced standing figures flanking a central crest.

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