He determined the percentages of carbon, hydrogen and oxygen in the sugar and in the products of fermentation, and concluded that sugar in fermenting breaks up into alcohol, carbonic acid and acetic acid.
Markets are established in the city where peasants can bring their surplus supplies and the products of the soil.
"What are your products?" enquired the Wizard.
In the Black Sea they exploited the shores of Pontus and Scythia, whose products they exchanged for textiles spun from the wool of their own country.
An exception worth noting is that the poor who get better products at cheaper prices will see their wealth rise accordingly.