Input (grade 13): He conceived the idea of a periodical that would cover every topic the educated public was interested in, from commerce to poetry, and tried to convince several London printers and booksellers to take up the idea.
Output (grade 11): He came up with the idea of a periodical that would cover every subject the educated public was interested in, from commerce to poetry. He tried to get some London printers and booksellers to take up the idea.