I just recieved my Grandmother's soap making recipe, it is at least 60 years old, hand written in her cook book. This is a direct transcription of it; 3 Parts, (pints?) rainwater in a large stone jar in P.M. , 2 heaping Tbs. powdered Borax, 1/2 cup ammonia, 1 can of lye, (the old lewis lye I...