This section of the Bohemian literature is particularly rich in herbals. Several works of instruction in botany were also written. A manuscript of 1447, "On the inoculation of Trees," may be mentioned here, although belonging rather to the department of agriculture. The Bohemian language, although improving and evidently rising in esteem with every lustrum of the fifteenth century, had however not yet supplanted the Latin. Many of the most eminent among the learned of this period preferred still to write in Latin: as Hieronymus Balbus, Bohuslav, Hassenstein of Lobkowic, Shlechta, Olomucius, and a number of others; who all contributed nevertheless to elevate the glory of the Bohemian name, and could not but exert a powerful influence on the nation. In respect to the date of the introduction of printing into Bohemia, the first regular printing establishment at Prague is not older than A.D. 1487. Several Bohemian books, however, were printed before this time by travelling workmen. In regard to the first work printed in the Bohemian language historians are not entirely agreed. According to Jungmann,[26] a letter from Huss to Jakaubek, of 1459. was the first specimen of Bohemian printing; the above-mentioned chronicle of Troy of 1468 the second; and the New Testament of 1475 the third. According to Dobrovsky, the New Testament of 1475 is the earliest printed work in Bohemian. From that year to 1488, only seven Bohemian works appear to have been issued from the press; among which was a Psalter and another New Testament. In 1488, after the foundation of a regular printing office, the whole Bohemian Bible was printed for the first time; in the same year the History of Troy again, and the Roman chronicle; and in the following year the first Bohemian almanac, and the Bible of Kuttenberg. The subsequent editions belong, as to time, to the following period; but are given in the note below.[27] THIRD PERIOD. _Golden age of the Bohemian Literature. From the diffusion of printing, about A.D._ 1500, _to the battle at the White Mountain, A.D._ 1620.