This is a vintage scientific illustration, likely a plate from a diatom atlas. The image is rendered in a cyanotype or blueprint style, with all elements appearing in shades of blue against a light background. It features numerous diagrams of diatoms, microscopic single-celled algae with intricate silica shells. The diatoms are depicted in various shapes and sizes, including conical, cylindrical, and circular forms. Each diatom is composed of a network of dots and lines, creating complex patterns and textures. The image is numbered from 1 to 13, indicating individual diatom species or variations. The overall aesthetic is detailed, precise, and characteristic of scientific illustrations from the 19th or early 20th century. The image is labeled 'Plate 114' at the top, and the title 'A. Schmidt's Diatom-Atlas' is also visible. The illustration is a valuable resource for studying diatom morphology and taxonomy.