Table of ContentsDefects in CrystalsCrystalline materialsSimple crystal structuresObservation of Dislocations: Surface methodsDecoration methodsElectron microscopyMovement of Dislocations: Concept of slipDislocations and slipThe slip planeCross slipElastic dislocationDislocations in Face-Centred Cubic Metals: Perfect dislocationsPartial dislocations - the Shockley partialDislocations in Other Crystal Structures: Dislocations in hexagonal close-packed metalsDislocations in body-centred cubic metalsJogs and the Intersection of Dislocations: Intersection of dislocationsMovement of dislocations containing elementary jogsOrigin and Multiplication of Dislocations: Dislocations in freshly grown crystalsHomogeneous nucleation of dislocationsDislocation Arrays and Crystal Boundaries: Plastic deformation, recovery and recrystallisationSimple dislocation boundariesStrength of Crystalline Solids: Temperature-and strain-rate-dependence of the flow stressThe Peierls stress and lattice resistance