1890 Scientific American  
The last issue of the SCIENTIFIC AMERICAN, under the caption " Valuable Points by a Plumber," gives di rections for clearing waste pipes by the use of soda lye. Experience prompts me to suggest the use of potash lye instead. The saponifying effect is more complete, and the result more easily washed a.way than if the less energetic soda lye be used.
doi:10.1038/scientificamerican08231890-117 fatcat:xw2vbhy52vbc7lb2pfbs2ufkn4