Abstract
<h3>To the Editor:</h3> —In respect to patented medicines and nostrums which are generally controlled by "process patents" I think you will find, as I did, that the most interesting communication on that subject in medical annals was the report made to Congress in 1849-1850 and to the American Medical Association in 1850, by Dr. Edwards. It could not be bettered much if any at this date. You should have a copy of the "Jackson and Morton Patent No. 4848 for Improvement in Surgical Operations" in your files. Gwathmey (Anesthesia, 1924) refers to the "application" for a patent by Jackson and Morton in the following language: <h3>LETHEON.</h3> —On October 27, 1846, Morton and Jackson sought to patent their anaesthetic under the name of "Letheon." From its odor it was soon recognized as "sulphuric ether." That is an erroneous statement, "Letheon" being merely a "trade name" used in the sale of the
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