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Show Roman SyBtem of Figuring. Counting on tho flngors was a rog-ular rog-ular system for tho young Romans. They would mako olfhteon movements move-ments with tho left nana for tho numbers num-bers bolow 100, and eighteen with tho right hand for tboso above. Two kinds nt counting machines, called an abacus, wero also used, Ono was a board strown with sand, on which goomotrlcat figures wero drawn, Tho other was a framo, with balls moved In groovos to represent figure's, with a special contrivance for doing tractions. trac-tions. As teachers woro not vory patent pa-tent In those days, arithmetic might ba said to have been learned loss by rule than by ferrule. |
