Diatom, Heliopelta metil. Magnification: 350x. Photomicrograph made by Arthur E Smith in the early 1900s, using a combined microscope and camera. In 1904, the Royal Society in London exhibited a series of Smith's photomicrographs to the public. They were later published in 1909 in a book called "Nature Through Microscope & Camera." They were the first examples of photomicroscopy many had ever seen.

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Keywords: ., 1900s, 20th, algae, arthur, bw, camera, cell, century, diatom, early, heliopelta, history, lm, metil, microbiology, micrograph, microscope, nature, photo-micrograph, photographic, photography, photomicrograph, phytoplankton, smith, technology, unicellular