Epistolarum Medicinalium, Conradi Gesneri, philosophi et medici Tigurini, libri III. : His accesserunt eiusdem Aconiti primi Dioscoridis Asseueratio, & De Oxymelitis Elleborati utriusq[ue] descriptione & usu Libellus.
Version 3 can be requested by using "Content Negotiation" as described in IIIF API Version Switching