A few feet away, his father was carefully calculating, with the aid of a ready reckoner, the compound interest on a little pile of bills of exchange which lay before him.
"The New Tenant"
E. Phillips Oppenheim
When we are dealing with men, our ready-reckoner rules do not work out correctly.
"Friendship"
Hugh Black
The problem of practical ethics is to construct a calculus of pleasures, a sort of ready-reckoner whereby men may be able to invest in the most profitable course of action.
"The Faith of the Millions (2nd series)"
George Tyrrell