Dilatations on the Materia Medica
Bencao yan yi, xylographic edition of the Song Dynasty. Written by Kou Zongshi in 1116. This was a supplement to Jiayou buzhu Shennong bencao and Tujing bencao, hence the title. It provides critical notes on and analyses of 410 medicinal substances from the former work. (Collection of National Beijing Library.)