1962 MEYER, Karl Friedrich (1884 – 1974); RAVASINI, Carlo

Disinfected mail: Historical review and tentative listing of cachets, handstamp markings, wax seals, wafer seals and manuscript certifications alphabetically arranged according to countries, by K.F. Meyer, in collaboration with C. Ravasini ...[et al.].

From the 15th to near the end of the 19th century attempts were made to decontaminate mail which had been in contact with plague, smallpox, cholera, and other contagious diseases.

GMN 11850 · https://historyofmedicine.com/id/14054