102pp, 12 black and white plates containing numerous illustrations from micrographs. Green cloth-covered boards; gilt titles on spine. 4to. Rubbed corners and spine ends, cloth worn through. Text block edges tanning. Endpapers tanned. Internally neat, clean and tight; barring some foxing.
This second edition has an important appendix (pp77-98) based on 280 further experiments (in addition to the 196 experiments on which the first edition of 1911 is based) and has two further plates giving a total of 70 figures.
