In eighteenth-century Germany the universal harmony of God's creation and the perfection of its proportions still held philosophical, moral and devotional significance. Reproducing proportions close to the unity (1:1) across compositions could render them beautiful, perfect and even eternal. Using the principles of her groundbreaking theory of proportional parallelism and the latest source study research, Ruth Tatlow reveals how Bach used the number of bars to create numerical perfection across his published collections, and explains why he did so. The first part of the book illustrates the wide-ranging application of belief in the unity, showing how planning a well-proportioned structure was a normal compositional procedure in Bach's time. In the second part Tatlow presents practical demonstrations of this in Bach's works, illustrating the layers of proportion that appear within a movement, a work, between two works in a collection, across a collection and between collections.

In eighteenth-century Germany the universal harmony of God's creation and the perfection of its proportions still held philosophical, moral and devotional significance. Reproducing proportions close to the unity (1:1) across compositions could render them beautiful, perfect and even eternal. Using the principles of her groundbreaking theory of proportional parallelism and the latest source study research, Ruth Tatlow reveals how Bach used the number of bars to create numerical perfection across his published collections, and explains why he did so. The first part of the book illustrates the wide-ranging application of belief in the unity, showing how planning a well-proportioned structure was a normal compositional procedure in Bach's time. In the second part Tatlow presents practical demonstrations of this in Bach's works, illustrating the layers of proportion that appear within a movement, a work, between two works in a collection, across a collection and between collections.

In 1947 the theologian and musicologist Friedrich Smend published a study which claimed that J. S. Bach regularly employed the natural-order number alphabet (A=1 to Z=24) in his works. Smend provided historical evidence and music examples to support his theory which demonstrated that by this means Bach incorporated significant words into his music, and provided himself with a symbolic compositional scheme. Since then many people have taken up Smend's theory, interpreting numbers of bars and notes in Bach scores according to the natural-order alphabet. By presenting a thorough survey of different number alphabets and their uses in seventeenth- and eighteenth-century Germany, Dr Tatlow investigates the plausibility of Smend's claims. Her new evidence fundamentally challenges Smend's conclusions and the book sounds a note of caution to all who continue to use his number-alphabet theory. Dr Tatlow's painstaking research will fascinate all those with an interest in the music of J. S. Bach and German Baroque culture, and will be of particular importance for music historians and analysts.

In 1947 the theologian and musicologist Friedrich Smend published a study which claimed that J. S. Bach regularly employed the natural-order number alphabet (A=1 to Z=24) in his works. Smend provided historical evidence and music examples to support his theory which demonstrated that by this means Bach incorporated significant words into his music, and provided himself with a symbolic compositional scheme. Since then many people have taken up Smend’s theory, interpreting numbers of bars and notes in Bach scores according to the natural-order alphabet. By presenting a thorough survey of different number alphabets and their uses in seventeenth- and eighteenth-century Germany, Dr Tatlow investigates the plausibility of Smend’s claims. Her new evidence fundamentally challenges Smend’s conclusions and the book sounds a note of caution to all who continue to use his number-alphabet theory. Dr Tatlow’s painstaking research will fascinate all those with an interest in the music of J. S. Bach and German Baroque culture, and will be of particular importance for music historians and analysts.