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Further observations on the medical leech : including a reprint, from the Philosophical Transactions, of two memoirs, comprising observations on the hirudo vulgaris, or common rivulet leech ; and on the h. stagnalis and h. complanata, now constituting the genus glossopora / [J.R. Johnson]. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.