Letter from Mr. Ceely on the Experiments of Gassner, with Professor Heim's Researches on the First Attempt to Ascertain the Nature of Small-pox MatterProv Med Surg J 1842; s1-4 doi: https://doi.org/10.1136/bmj.s1-4.7.136 (Published 21 May 1842) Cite this as: Prov Med Surg J 1842;s1-4:136
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