The classification which we have adopted in this catalogue is that of Dr. Aristides Brezina, of Vienna, whose study and published investigations of Meteorites have placed him for the last quarter of a century in leading rank among European workers in this field.

Dr. Brezina - for many years director of the Mineral Cabinets of the Royal Museum of Vienna -first announced and employed his system of classification in the catalogue of the Meteorites of this great museum in 1885. In a second catalogue, in 1896, he repeated the same classification with such modifications as further study and the general advance of the science-largely due to added discoveries and new meteorite falls-had induced.

Now, under date of January, 1904, Dr. Brezina has favored me with his last revision of his system, with the privilege of here presenting it for the first time in printed form

2. Chladnite, veined (Chla). Bronzite, black or metallic veined.

*N. B.--While following Dr. Brezina's text as closely as possible in our English translation of his manuscript as to the definitions of the groups, we have taken the liberty of giving our own chosen names for the meteorites themselves which he has ranged under each group. This has been essential for the unity of our catalogue. Nothing will be perverted by our giving as our accepted name to a given meteorite what he has given as synonym of the same fall.

10. Howardite (Ho). Bronzite, Olivine, Augite and Anorthite.

Bialystock. Frankfort. La Vivionnére. Luotolaks. Nobleborough. Pavlovka. Petersburg. Saint Nicolas. Zmenj.

11. Howardite, breccialike (Hob). Bronzite, Olivine, Augite and Anorthite, breccialike.

Yodze.

12. Leucituranolite (L). Leucite, Anorthite, Augite and Glass.

Schafstädt.

B. CHONDRITES.

Bronzite, Olivine and Nickel Iron. With Round or Rounded and Polyhedric Chondri.

13. Howarditic Chondrite (Cho). Polyhedric Segregations preponderating, round Chondri scarce. Crust bright in parts.

Borgo San Donino, Harrison County, Krähenberg, Mauritius, Ottawa, Santa Barbara,
Sevilla, Siena, Sitathali.

14. Howarditic Chondrite, veined (Choa). Polyhedric Segregations preponderating, round chondri scarce. Metallic or black veins.

Iharaota. (Lalitpur).

15. White Chondrite (Cw). White, rather friable mass with few Chondri, mostly white.

Bachmut, Bocas, Cabezzo de Mayo, De Cewsville, Dolgowoli, High Possil, Karakol, Kusiali, La Becasse, Les Ormes, Lesves, Linum, Lundsgard, Mascombes, Mauerkirchen, Middlesborough, Milena, Montlivault, Mooradabad, Mordvinovka, Oesel, Ogi, Oviedo, Pnompehn, Pricetown, San Pedro, Tourinnes.

16. White Chondrite, veined (Cwa). White, rather friable mass with few, chiefly white, Chondri. Metallic or black veins.

Allahabad, Angers, Asco, Aumieres, Bherai, Buschhof, Castine, Chandpur, Drake Creek,
Dhulia, Forsyth, Galapian, Girgenti, Gross Liebenthal, Honolulu, Kalumbi, Kharkow,
Killeter, Kikino, Kuleschovka, Luce, Madrid, Marion, Minas Geraes, Mocs, Pirgunje,
Politz, Sauguis, Schönenberg, Scholokov, Senhadja, Ski, Slobodka-Partsch, Virba,
Wold Cottage, Zaborzika, Zomba.

17. White Chondrite, breccialike (Cwb). White, rather friable mass with few, chiefly white, Chondri, breccialike.

Aleppo, Gerona, Lissa, Monte Milone, Pacula, Uden.

18. Intermediate Chondrite (Ci). Firm, polishable mass, white and gray Chondri, breaking with matrix.

Alfianello, Butsura, Canellas, Charwallas, Dhurmsala, Deal, Favars, Mhow, Rakowka,
Saint Caprais, Vago.

19. Intermediate Chondrite, veined (Cia). Firm, polishable mass, white and gray Chondri, breaking with matrix.

Agen, Barntrup, Bath Furnace, Berlanguillas, Bori, Chateau Renard, Dandapur, Durala, Duruma, Fisher, Ghambat, Krähenberg, Lancon, Long Island, Macao, Maeme, Mainz, Nerft, New Concord, Orange River, Salles, Schellin, Toulouse, Vouille, Zabrodje, Zavid. 20. Intermediate Chondrite, brecciated (Cib). Firm, polishable mass, white and gray Chondri, breaking with matrix, breccialike.

Bielokrynitschie, Chandakapur, Laborel, L'Aigle, Luponnas, Ness County, Pulsora, Saint
Mesmin, Shytal.

21. Gray Chondrite (Cg). Firm, gray mass, Chondri of various kinds, breaking with matrix.

Botschetschki, Cross Roads, Cynthiana, Esnandes, Higashi Koen, Knyahinya, Lutschaunig.
Nagy Borove, Seres, Tounkin.

22. Gray Chondrite, veined (Cga). Firm, gray mass, Chondri of various kinds breaking with matrix, veined.

Agra, Aldsworth, Alesandria, Apt, Barbotan, Blansko, Charsonville, Cronstadt, Danville,
Darmstadt, Fukutomi, Grüneberg, Hungen, Kakowa, Kerilis, Lasdany, Lerici, Monroe,
Mornans, Oczeretna, Ohaba, Parnallee, Udipi, Umballa, Wessely.

23. Gray Chondrite, breccialike (Cgb). Firm, gray mass, Chondri of various kinds, breaking with matrix, breccialike.

Akburpur, Assam, Barratta, Borodino, Beuste, Cangas de Onis, Castalia, Chantonnay,
Clohars, Doroninsk, Homestead, Khetrie, Limerick, Makariwa, Mezö-madaras, Mexico,
Molina, Nulles, Okniny, Pultusk, Quincay, Salt Lake City, Sena, Slavetic, Supuhee,
Ställdalen, Tomhannock, Tysnes.

24. Orvinite (Co). Black, infiltrated mass; fluidal structure; surface uneven; discontinuous crust.

Orvinio.

25. Tadjerite (Ct). Black, semi-glassy mass without crust on surface.

Tadjera.

26. Black Chondrite (Cs). Dark or black mass, Chondri mostly of various colors, breaking with matrix.

Bishunpur, Grossnaya, MacKinney, Renazzo, Sevrukovo.

27. Black Chondrite, veined (Csa). Dark or black mass, Chondri of various colors in the main, breaking with matrix; veined.

Farmington.

28. Ureilite (U). Black mass, chondritic or granular, iron in veins or incoherent. Dyalpur, Goalpara, Nowo Urei.

29. Carbonaceous Chondrite (K). Dull black, friable Chondri with free carbon and of low specific gravity, metallic iron nearly or wholly wanting.

Alais, Cold Bokkeveld, Grazac, Kaba, Mighei, Nogoya, Nawapali, Orgueil.

30. Carbonaceous Chondrite, spherulitic (Kc). Dull gray or black friable mass with free carbon; chondri not breaking with matrix, metallic nickel-iron. Felix, Lancé.

31. Carbonaceous Chondrite, spherulitic, veined (Kea). Dul' black, firm mass with free carbon; Chondri not breaking with matrix, metallic nickel-iron; metallic veins.

Indarch.

32. Spherulitic Chondrite (Ce). Friable mass with firm Chondri of radiate structure, not breaking with matrix.

Albareto, Andover, Assisi, Ausson, Avilez, Benares, Bjelaja-Zerkov, Borkut, Cape Girardeau,
Collescipoli, Epinal, Gnadenfrei, Gopalpur, Gross Divina, Guca, Hessle, Itapicuru-Mirim,
Jhung, Judesegeri, Kaee, Kheragur, Krasnoj Ugol, Le Pressoir, Misshof, Montignac,
Motta di Conti, Mount Browne, Muddoor, Mühlau, Nanjemoy, Nellore, Pine Bluff,
Praskoles, Quenggouk, Rochester, San Emigdio, Searsmont, Sindhri, Slobodka, Soko-
banja, Tieschitz, Timochin, Tomatlan, Torre, Witmess, Yatoor, Zebrak, Zsadany.

33. Spherulitic Chondrite, veined (Cca). Friable mass with firm Chondri of radiate structure, not breaking with matrix; black or metallic veins.

Bjurböle, Nammianthal, Phu Hong, Piquetberg, Saint Denis, Tennassilm, Trenzano, Utrecht,
Werchne Tschirskaja.

34. Spherulitic Chondrite, breccialike (Ccb). Friable, breccialike mass with firm Chondri of radiate structure, not breaking with matrix.

Bath, Bremervörde, Cereseto, Feid Chair, Forest, Gütersloh, Heredia, Kesen, Krawin,
Mooresfort, Ploschkowitz, Tabory, Waconda, Weston.

35. Ornansite (Cco). Friable mass of Chondri.

Allegan, Ornans, Warrenton.

36. Ngawite (Cen). Friable, breccialike mass of Chondri.

Ngawi.

37. Spherulitic Chondrite, crystalline (Cck). Slightly friable crystalline mass with firm Chondri of radiate structure, some breaking with matrix.

Ambapur Nagla, Beaver Creek, Bethlehem, Jerome, Lumpkin, Menow, Palézieux, Prairie
Dog Creek, Richmond, Saline, Sawtschenskoje.

38. Spherulitic Chondrite, crystalline, veined (Ceka). Slightly friable crystalline, veined mass with firm Chondri of radiate structure, some breaking with matrix.

Meuselbach.

39. Spherulitic Chondrite, crystalline, breccialike (Cckb). Slightly friable, crystalline, breccialike mass with firm Chondri of radiate structure, some breaking with matrix.

Pirthalla.

40. Crystalline Chondrite (Ck). Hard crystalline mass with firm Chondri of radiate structure, breaking with matrix.

Carcote, Cosina, Daniel's Kuil, Djati-Pengilon, Dundrum, Erxleben, Gilgoin Station,
Guarena, Indio Rico, Khairpur, Klein-wenden, Moteeka-Nugla, Oakley, Pillistfer, Pokra,
Segowlie, Simbirsk-Partsch, Stavropol, Tjabe, Toke-uchi-mura.

41. Crystalline Chondrite, veined (Cka). Hard, crystalline, veined mass with firm Chondri of radiate structure, breaking with matrix.

Kernouvé, Pipe Creek, Vernon County.

42. Crystalline Chondrite, breccialike (Ckb). Hard, crystalline, breccialike mass with firm Chondri of radiate structure, breaking with matrix.

Bluff, Ensisheim, Ergheo.

C. ENSTATITE-ANORTHITE-CHONDRITES.

Enstatite, Anorthite and Nickel Iron with Round Chondri.

43. Crystalline Enstatite-Anorthite-Chondrite (Cek). Hard crystalline mass with firm Chondri of radiate structure, breaking with matrix.

Hvittis.

Transition of Stones to Iron.

44. Mesosiderite (M).

D. SIDEROLITES.

Nickel-Iron in the mass cohering and showing as separate grains in section.
Crystalline Olivine and Bronzite with Iron.

Barea, Dona Inez, Estherville, Hainholz, Llaño del Inca, Lujan, Miney, Veramin.

45. Grahamite (Mg). Crystalline Olivine, Bronzite and Plagioclase with Iron.

Crab Orchard, Morristown, Vaca Muerta.

46. Lodhranite (Lo). Granular, crystalline Olivine and Bronzite with Nickel Iron.

Lodhran.

II. IRONS. Metallic Constituents Prevalent or Forming Entire Mass.

E. LITHOSIDERITES.

Transition from Stones to Iron. Nickel-Iron cohering in mass and in sections.

47. Siderophyre (Si). Grains of Bronzite with accessory Asmanite in Trias.

Steinbach.

48. Pallasite. Krasnojarsk Group (Pk). Rounded Crystals of Olivine in Trias Anderson, Brenham, Calderilla, Finmarken, Medwedewa, Mount Dyrring, Mount Vernon, Pavlodar, Port Orford.

49. Pallasite. Rokicky Group (Pr). Polyhedric crystals of Olivine, partly broken, and fragments separated by Nickel-Iron.

Admire, Brahin, Eagle Station.

50. Pallasite. Imilac Group (Pi). Olivine crystals fissured and compressed. Imilac, Marjalahti.

51. Pallasite. Albacher Group (Pa). Olivine crystals in fine, brecciated Trias.

Albacher Mühle.

F. OCTAHEDRITES.

Kamacite, Taenite and Plessite in Lamellae. Concameration of the four octahedron faces.

52. Finest Octahedrite (Off). Lamellae up to 0.2 mm. in thickness.

Bacubirito, Ballinoo, Butler, Carlton, Cowra, Grosslè, Laurens, Mart, Mukerop, Mungindi,
Salt River, Tazewell, Tocavita, Werchne Dnieprowsk.

53. Fine Octahedrite. Victoria Group (Ofv). Not well defined.

Victoria West.

54. Fine Octahedrite (Of). Thickness of Lamellae 0.2-0.4 mm.

Alt Biela, Apoala, Augustinowka, Bear Creek, Bella Roca, Bethany, Boogaldi, Bridgewater, Cambria, Charlotte, Chupaderos, Cuernavaca, Grand Rapids, Hassi Jekna, Jamestown, Jewell Hill, Jonesboro, La Grange, Madoc, Mantos Blancos, Misteca, Moonbi, Obernkirchen, Prambanan, Putnam County, Quesa, Russel Gulch, Saint Genevieve, Serrania de Varas, Smith's Mountain, Thurlow, Yanhuitlan.