1. Restoring discolored teeth to normal;Chapple;D. Cosmos,1877
2. Bleaching teeth;Taft;Am. J. D. Sci.,1878
3. Atkinson’s method of bleaching teeth;Atkinson;D. Cosmos,1879
4. The removal of stains from the teeth caused by administration of medicinal agents and the bleaching of pulpless teeth;Harlan;Am. J. D. Sci.,1884
5. Bleaching teeth, by electricity;Westlake;Am. J. D. Sci.,1895