“Our next incentive to induce children to write is brought about by our free and convenient system of motor travel. This travel creates a large and wide acquaintance among children as well as among older persons. This extensive acquaintance naturally brings about a great deal of correspondence. “Many of us are stenographers, and nearly all have a typewriter and a phonograph, which are so improved and simplified now on Mars that you would scarcely know them. “You see in this way we have many incentives which will induce children and adults of all ages to become proficient in handwriting, typewriting and in composition. “_Mathematics._--In the first place, let us not overlook the fact that our financial, social and industrial organizations have vastly simplified our mathematics. In weights and measures we have adopted something like your metric system. In commercial transactions we have no profit and loss; no stocks and bonds; no premiums and discounts; no commission and brokerage; no stock investments; no insurance, taxes and revenues; no interest, partial payments, true discount, bank discount, exchange, equation of payments; no annual or compound interest; no annuities; no partnership. This does away with nearly all the difficult parts of arithmetic on which your children have to spend years of unproductive and destructive labor. “Our children learn to count as soon as they can talk. Every one with whom they come in contact is their teacher. Figures and numbers are taught as soon as the child begins to learn its letters. Children also teach one another how to read and write figures and numbers, and how to cipher. During favorable weather the slates in the nurseries and parks are nearly always in use. “When they grow up to be a little older, they find delight in studying mathematics during part of their leisure time. All the higher mathematics--algebra, geometry, trigonometry, calculus, and various other measurements--are well understood by nearly all our men and women. You must not forget, that on account of the Marsites’ intellectual advancement they can learn mathematics with much less labor than they could formerly, or than _you_ can _now_.