INDEX 



203 



Meteorites, classification of, 4, 5. 

 illustrated, 114. 

 proportions of types of, 7. 

 Microetching, 12, 13, 15, 16, 95, 97, 98, 



100. 

 Microexamination, 2, 3, 101. 

 Microplessite, 15. 

 Micropolishing, 23, 96, 101. 

 Monahans 2 meteorite, 18, 65, 114, 138, 



167, 168. 

 Morradal* meteorite, 40, 69, 73, 115, 



148. 

 Mount Joy ^ meteorite, 64. 

 Mount Sterling ' meteorite, 75. 

 Muchachos * meteorite, 7. 



Nedagolla * meteorite, 7. 

 Needles, kamacite, 7, 8, 46, 65, 68, 69. 

 nature of, 8, 19, 68. 

 schreibersite, 8, 13, 18, 19, 53, 63, 



88, 92. 

 taenite, 8, 15. 

 troilite, 13. 

 Nelson County ' meteorite, 115, 127. 

 Neumann bands, 88, 89. 

 Neumann lines, 88. 



affected by heat alterations, 72, 73, 



75 76 91. 

 definition of, 53, 88. 

 distinction from slip bands, 89. 

 "false," 11, 61, 92. 

 formation of, 89, 90. 

 in ataxites, 4, 76, 88. 

 in ferrite, 89, 90. 

 in hexahedrites, 4, 5, 50, 52, 53, 76, 



88-90. 

 in kamacite, 88, 89. 

 in octahedrites, 4, 16, 88. 

 occurrence of, 88, 89. 

 origin of, 89. 

 relation to sheen, 11, 53. 

 resemblance to gamma twinning, 

 90. 

 New Baltimore* meteorite, 52, 61, 64, 



89, 92, 115, 196-198. 

 Nickel, effect on octahedral structure, 

 56. 



effect on transformation, 9, 44. 



errors in content, 9, 10. 



in ataxites, 7. 



in cohenite, 22, 23. 



in eutectoid structures, 82. 



in hexahedrites, 4, 11, 51. 



in iron carbide, 23. 



in kamacite, 10, 11, 45, 47, 51. 



in octahedrites, 5-7, 10, 43, 45, 



55-58, 61. 

 in plessite, 38, 103. 

 in taenite, 15, 38, 39, 46, 47, 103. 

 properties of, 26. 

 role in hysteresis, 28, 40, 42. 

 Nickel-iron, meteoric. (See Iron- 

 nickel.) 

 Nordheim 2 meteorite, 115, 140. 



' Octahedrite. 



2 Ataxite, nickel-rich. 



2 Hexahedrite. 



« Ataxite, nickel-poor. 



Octahedrites, 54. 



alteration zones in, 51, 72. 



analyses of, 10. 



bands in, 5, 12, 55, 61. 



classification of, 4, 5, 64, 65. 



cohenite in, 21, 23. 



composition of, 5, 10, 65. 



definition of, 4, 5, 38, 54. 



delta-gamma transformation in, 57, 

 58, 60. 



eutectoids in, 36. 



false cleavage in, 5, 49. 



gamma-alpha transformation in, 43, 

 55, 60. 



granulation in, 49, 50, 62, 63, 75. 



kamacite in, 4, 5, 7, 8, 11, 13, 16, 

 36, 44, 55, 56, 61, 67, 87. 



Neumann lines in, 4, 16, 88. 



nickel in, 5-7, 10, 43, 45, 55-58, 61. 



plessite in, 5, 6, 8, 15-17, 46, 47, 

 65-69. 



ragged structure in, 62. 



result of low-temperature equilib- 

 rium, 44, 59. 



schreibersite in, 5, 19-21. 



sheen in, 11, 12. 



structural fineness of, 56. 



taenite in, 5, 6, 14, 15, 17, 36, 39, 

 44, 45, 47, 49, 55, 56, 61, 62, 67. 



transformation structure in, 56, 

 60-62. 



transitional types of, 7, 54, 64, 65. 



troilite in, 13, 17, 59, 87. 



Widmanstatten structure in. (See 

 under Widmanstatten structure.) 



[The following meteorites are octa- 

 hedrites: Ainsworth, Apoala, 

 Arispe, Bacubirito, Ballinoo, Bar- 

 ranca Blanca, Beaconsfield, Bear 

 Creek, Bendego, Breece, Burling- 

 ton, Butler, Canton, Canyon 

 Diablo, Cape York, Carlton, Cas- 

 as Grandes, Cleveland, Cooke- 

 ville, Copiapo, Cosby Creek, 

 Dungannon, El Burro, El Inca, 

 Four Corners, Glorieta Moun- 

 tain, Grand Rapids, Grant, Ham- 

 mond, Helt Township, Henbury, 

 Kenton County, Laurens County, 

 Leeds, Magura, Mount Joy, 

 Mount Sterling, Nelson County, 

 Odessa, Osseo, Pine River, Pitts, 

 Prambanan, Puquios, Reed City, 

 Roebourne, Sacramento Moun- 

 tains, Salina, San Francisco 

 Mountains, Santa Luzia de Goy- 

 az. Savannah, Seelasgen, Seneca 

 Township, Smith's Mountain, 

 Smithville, Social Circle, Staun- 

 ton, Tamarugal, Tazewell, Thun- 

 da, Toluca, Trenton, Unidenti- 

 fied, Wichita County, Woods 

 Mountain, Yanhuitlan, Younde- 

 gin, Zacatecas — q. v.\ 



