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2020-12-18 20:09:05
RIESE (or RIES], Adam
Rechnung nach der lenge, auff den Linihen und Feder. Darzu forteil und behendigkeit durch die Proportiones Practica genant. Mit grüntlichem unterricht des visierens
Jakob Bärwald, Leipzig, 1550. THE MOST IMPORTANT 16TH CENTURY GERMAN ARITHMETIC. First edition, rare, of Riese's last, and most comprehensive, arithmetic text. "Riese (1492-1559), while not the first Rechenmeister to publish an arithmetic book in Germany, was by far the most famous and influential. His works went through at least one hundred editions and were used in schools for over a century. They were the main force behind the replacement of the old methods using the table abacus (auff der Linien) by the new use of the pen (auff Federn)" (Tomash & Williams). "A comprehensive work, which far surpassed his books written at Erfurt, especially in the number of examples. Most of the work had been completed by 1525; but it was not published until 1550, after Elector Maurice of Saxony had advanced the printing costs. Because the expense was so great, the book was reprinted only once, in 1616. It represents the culmination of Riese's work, and is the best exponent of the practical arithmetic of the middle of the century in Germany" (Smith). 'Line reckoning' was a legacy from Roman times: several parallel lines are drawn on a board associated with powers of 10 (1, 10, 100, .); a given number is represented by placing the appropriate number of counters on each line; two numbers are added by amalgamating their counters, moving groups of 10 counters from each row to the one above; subtraction is similar. Printed texts such as the present work clearly demonstrated the superiority of the use of Hindu-Arabic numerals (use of the pen), especially for multiplication and division. The pre … [Click Below for Full Description]
Bookseller: SOPHIA RARE BOOKS [Koebenhavn V, Denmark]
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