Pour the boiling water over the borax and oil; let it cool; then put the mixture into a bottle. Shake it before using, and apply it with a flannel. Camphor and borax, dissolved in boiling water and left to cool, make a very good wash for the hair; as also does rosemary water mixed with a little borax. After using any of these washes, when the hair becomes thoroughly dry, a little pomatum or oil should be rubbed in to make it smooth and glossy—that is, if one prefers oil on the hair.
The White House Cookbook (1887).