CONTENTS VII 



XV. Carbon and sulphur in meteoric iron 83 



Martensite and troostite 83 



Instances of Fe-C structures 84 



Ferrous sulphide 86 



Reichenbach lamellae 87 



Expansion of troilite 87 



Swathing kamacite 87 



XVI. Neumann lines and deformations 88 



Occurrence 88 



Neumann lines and slip bands 89 



Origin 89 



Resemblance to gamma twinning 90 



Manner of formation 90 



Thermal alteration 91 



"False" Neumann lines 92 



Deformations 92 



Causes of displacements 92 



Evidence of air pressure 93 



XVII. Metallographic techniques 93 



Specimens for study 93 



Macroexamination 94 



Macroetching 95 



Micropolishing 96 



Microetching 97 



Preserving specimens 101 



Microexamination 101 



Photography 102 



Other methods of study 103 



XVIII. Bibliography 105 



Systematic treatises 105 



Descriptions and studies 106 



Catalogs and lists 107 



Bibliographies ; current literature 107 



Illustrations 108 



Metallography 108 



X-ray analysis 109 



Literature cited 109 



Plates 114 



Index 199 



TEXT FIGURES 



1 . Solidification of pure iron 27 



2. Schematic equilibrium diagram 31 



3. The iron-carbon equilibrium diagram 33 



4. Early iron-nickel diagram 37 



5. Eclectic iron-nickel diagram 41 



6. Iron-nickel constitution diagram 42 



7. Bradley and Goldschmidt's iron-nickel diagram 44 



8. Composition ranges of meteoric irons 48 



9. The delta-gamma transformation in nickel-iron 57 



