Standard work containing all principles works. Parallel text Dutch (facsimile of original editions, mostly Plantin, Leiden) and English translation. Extensive notes and commentairies by scientists; almost all pubications by the Flemish mathematician and engineer Simon Stevin (1548/49-1620), who beside his many inventions made important contributions to mathematics, the philosophy of science, bookkeeping, music theory and the art of war (as advisor and teacher of Prince Maurits of Nassau, during the Dutch 80 years war against Spain; amongst his most important publications are : Tafelen van Interest (Tables of interest) in 1582; Problemata geometrica in 1583; De Thiende (La Theinde, The Tenth) in 1585 in which decimals were introduced in Europe; La pratique d'arithmétique in 1585; L'arithmétique in 1585 in which he presented a uniform treatment for solving algebraic equations; De Beghinselen der Weeghconst in 1586, accompanied by De Weeghdaet; De Beghinselen des Waterwichts (Principles on the weight of water) in 1586 on the subject of hydrostatics; Vita Politica. Named Burgherlick leven (Civil life) in 1590; De Stercktenbouwing (The construction of fortifications) published in 1594; De Havenvinding (Position finding) published in 1599; De Hemelloop in 1608; Wiskonstighe Ghedachtenissen (Mathematical Memoirs). This included earlier works like De Driehouckhandel (Trigonometry), De Meetdaet (Practice of measuring), and De Deursichtighe (Perspective); Castrametatio, dat is legermeting and Nieuwe Maniere van Stercktebou door Spilsluysen (New ways of building of sluices) published in 1617; De Spiegheling der Singconst (Theory of the art of singing); fine and copmplete set in very good condition (dustjacket sl. frayed at edges, bindings perfect, interior clean, no annotations or stamps)