What was the primary economic arrangement utilized by the Boulton & Watt partnership for selling their engines?

Answer

Charging a royalty fee equal to one-third of the coal saved by the user.

Boulton and Watt incentivized efficiency by structuring their payment as a royalty based on the fuel savings achieved by the customer compared to the older Newcomen engines.

What was the primary economic arrangement utilized by the Boulton & Watt partnership for selling their engines?
HistoryinventorengineeringMechanicsteam engine