This document contains a photographic register of 10 microorganisms viewed under a microscope at 40x magnification, including the algae Euglena, Ankistrodesmus Falcatus, Nitzschia, Asterionella, Estigeoclonium, Rhizoclonium, Navicula, Cladophora, Oocystis, and the diatom Synedra ulna.