The third and last group of monoethers studied in this series of investigations' comprises the derivatives of pyrocatechol. The antibacterial action of the parent compound pyrocatechol and of its methyl ether, guaiacol has been studied by many investigators in the past. It is not intended to give a complete tabulation of these findings; the general conclusion may be drawn from them, that as a bactericidal agent, pyrocatechol is less effective than phenol ...