. A laboratory manual of soil bacteriology. Soil microbiology. Fig. 8.—Iron bacteria: A, Crenothrix thread showing germination of spores within sheath; X 850. B, Chlamydothrix showing simple and curved threads; X 850. 85. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Fred, Edwin Broun, 1887-1981. Philadelphia, London, W. B. Saunders Company

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