A more thorough explanation:

Measuring money is a historical term that refers to an extra tax collected on cloth. This tax was abolished during the reign of Henry IV.

For example, in medieval England, a merchant who sold cloth would have to pay an additional fee to the government, known as measuring money. This fee was based on the amount of cloth being sold and was used to help fund the government.

This term illustrates how governments have historically used various methods to collect revenue, including taxes on goods and services. Measuring money was one such method used in medieval England.