The leaders of the Protestant Revolts, too, in asserting that each person should be able to read and study the Scriptures as a means to personal salvation, created an entirely new demand, in Protestant lands, for elementary schools in the vernacular. Heretofore the demand had been for schools only for those who expected to become scholars or leaders in Church or State, while the masses of the people had little or no interest in learning. Now a new class became desirous of learning to read, not Latin, but the language which they had already learned to speak. Wycliffe, Huss, Zwingli, Luther, Calvin, and Knox alike insisted on the importance of the study of the Bible as a primary necessity in the religious life. In an effort to bring the Bible within reach of the people Wycliffe's followers had attempted the laborious and impossible task of multiplying by hand (p. 290) copies of his translation. Zwingli had written a pamphlet on _The Manner of Instruction and Bringing up Boys in a Christian Way_ (1524), in which he urged the importance of religious education. Luther, besides translating the Bible, had prepared two general Catechisms, one for adults and one for children, had written hymns [7] and issued numerous letters and sermons in behalf of religious education. All these were printed in the vernacular and scattered broadcast. Luther thought that "every human being, by the time he has reached his tenth year, should be familiar with the Holy Gospels, in which the very core and marrow of his life is bound." In his sermons and addresses he urged a study of the Bible and the duty of sending children to school. Calvin's Catechism similarly was extensively used in Protestant lands. 1. _Lutheran School Organization_