Barley water is used as a diluent with normal infants and in forms of diarrhoea.
"The-Suffrage-Cook-Book"
Kleber, L. O., Mrs.
From these experiments pupils will learn the value of nitrogen as a diluent of the oxygen.
"Ontario Teachers' Manuals: Nature Study"
Ontario Ministry of Education
There is no production of the brewery more important to society than good table beer, whether it be considered as a diluent to animal food, or a diet drink in fever cases, even of the most malignant kind, where, to my knowledge, it has been preferred to all others, and that with the greatest success, sanctioned by the advice of some of the most eminent physicians.
"The American Practical Brewer and Tanner"
Joseph Coppinger