Page:Treatise on Soap Making.djvu/101
or boiling ley, be had from the composition. If too weak leys are used, there is a danger incurred of spoiling the whole soap, which is hardly to be righted again.
To guard against this great evil, observe the following rule: Suppose there is three leys of different qualities to be boiled with, two of them is over weak, one is too strong; try their strength mixed together, thus:
|9)||102||(11 3, or 1, the standard for boiling ley.|