. Acta Academiae scientiarum imperialis petropolitanae. Science. 3f=. Acla-. ^catl. l7i, . Ti^l-repol .Toin J. p JT Tal .^PsjC } .ju^xj" cTli «*/• /i<T»/T. 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 Imperatorskaia akademia nauk (Russia). Petropoli, Typis Academiae scientiarum

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