Overview At the time of this letter, Mark W. Harrington (1848-1926) was director of the Detroit (Michigan) Observatory where he worked on meteorology and astronomical research. He responded to a request of Alexander Ramsay (1822-1909), an editor, that he was agreeable to an exchange of issues of his own newly founded The American Meteorological Journal for meteorological and geographical issues of Ramsay's The Scientific Roll and Magazine of...