Quarto. (8)pp + 16 plates. An "atlas" of the human body, both male and female, with layered transparencies (trademarked "Trans-Vision") showing anatomical systems in highly organized and visually appealing detail. Each part bears a number corresponding to a 212-item index at the rear, cleverly designed to fold out for ease of use while analyzing the diagrams. Parke, Davis & Company issued a popular American edition, in English, that same year, but this Spanish edition remains unrecorded. The illustrator, Gladys McHugh, made quite the career as a medical illustrator, notably of a series of "Trans-Vision" manuals like the one present here. Text block spiral-bound to provide requisite flexibility, then bound in brown, gilt-stamped leatherette over boards. Mild foxing to interior, offsetting from spiral binding, boards overall rubbed and with cracking along joints. A very good example of the international need for functional medical texts, and the astonishing lack of archival evidence of the fact.