You can earn a 5%
commission by selling Irrigation Canals and Other Irrigation Works: Including the Flow of Water in Irrigation Canals and Open and Closed Channels Generally, with Tables Simplifying and Facilitating the Application of the Formulae of Kutter D'Arcy and Bazin
on your website. It's easy to get started - we will give you example code.
After you're set-up, your website can earn you money while you work, play or even sleep!
You should start right now!