The Royal Society
“The Philosophical Transactions of the Royal Society (Phil. Trans.) is a scientific journal published by the Royal Society of London. It was established in 1665, making it the first journal in the world exclusively devoted to science, and it has remained in continuous publication ever since, making it the world's longest-running scientific journal.” Scans of the journal's articles published prior to 1923 have been shared on Internet Archive under the Public Domain Mark.