FIRST EDITION, 8vo, pp. ix, [iii], 124. Pages 49-56 are lithographed sheets, folded with the blank side in and left unopened, plus two other leaves are also lithographed, errata slip tipped in at table of contents, numerous tables and diagrams within the text. Original green cloth, spine lettered in gilt. A little faint spotting and dustsoiling. Extremities bumped, some light marks, cloth defective at head of spine.