This is how people used to write scientific papers. Reprints of all of Walter’s published papers are now in the archive at Johns Hopkins. These 3×5 cards appear to have been his draft of a report on dog fly breeding in salt marshes.
This is how people used to write scientific papers. Reprints of all of Walter’s published papers are now in the archive at Johns Hopkins. These 3×5 cards appear to have been his draft of a report on dog fly breeding in salt marshes.