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.
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.
The quick wrap is easier, he instructed, holding up each of the products as he spoke.