Examples from the Web for pearlash
Thousands of wagon loads of pure saleratus and pearlash could be got here.Journal of a Trip to California by the Overland Route Across the Plains in 1850-51|E. S. (Eleazer Stillman) Ingalls
Take half a pound of turmeric, and a quarter of a pound of pearlash; boil in a gallon of water.Mrs. Hale's Receipts for the Million|Sarah Josepha Hale
Boil the wood in the rose-water in a glass vessel; then, when cold, add the pearlash and spirit.The Art of Perfumery|G. W. Septimus Piesse
Hard water spoils the color of vegetables; a pinch of pearlash or salt of wormwood will prevent that effect.A Poetical Cook-Book|Maria J. Moss
Pearlash water and sand is also good to extract grease and oil, they should be rubbed hard, then rinsed directly.