It is useless for living specimens of bacteria, and inferior for non-photosynthetic protists or metazoans, or unstained cell suspensions or tissue sections. Here is a not-so-complete list of specimens that might be observed using bright-field microscopy, and appropriate magnifications (preferred final magnifications are emphasized). Prepared slides, stained - bacteria (1000x), thick tissue sections (100x, 400x), thin sections with condensed chromosomes or specially stained organelles (1000x), large protists (100x). Smears, stained - blood (400x, 1000x), living preparations (wet mounts, unstained) - pond water (40x, 100x, 400x), living protists (40x, 100x, 400x occasionally), algae and other microscopic plant material (40x, 100x,…