Sendai, The General Department of Scientific research Saito Ho-On Kai, 1927-1931. Two volumes in two. 4to (25.3 x 18.5 cm). Numerous pages and illustrations. Uniform blue grained half linen over marbled boards. Spines with gilt titles.

A set of two volumes of works by scientists associated with the Saito Gratitude Foundation. The first volume contains five consecutively numbered monographs in the field of insect-plant interaction and, in particular, plant diseases caused by insects. The first - well-illustrated - is by Kota Monzen and titled Studies on some gall producing aphides and their galls. It includes a well-illustrated paper on fruit trees destroyed by fungi, viz. Studies on the pathology of peach canker, by K. Togashi. The second volume is a compilation of four studies published elsewhere by staff members, including one on aphids by O. Shinji (1927) with 163 pages and 19 plates; one on Palaeozoic plants and one on a Post-Pleistocene bison. All papers are of scientific importance, but rarely seen. Light wear to board edges; cancelled stamps on several title pages, otherwise a very good, clean set.