. Bulletin of the Essex Institute. Essex Institute; Natural history; genealogy. :/^ 7T'*2. DYKE OF BIOTITE TINGUAITE, IN AUG1TE SYENITE LEDGE, MANCHESTER, 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 Essex Institute. 1n. Salem, Mass. , Essex Institute

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