Illumination from La vigne de nostre seigneur, c. 1450-1470. Copyright Bodleian Library, University of Oxford

A heat advisory has been issued in 34 states in the US and 223 temperature records have been broken as a heat wave ravages over the eastern states and Canada. This image in the Artstor Digital Library comes to us from Manuscripts and Early Printed Books (Bodleian Library, University of Oxford).