摘要:

ABSTRACTA classificational sequence of meteorites, based upon what is called the Tschermak‐Brezina‐Prior—or, for brevity, Prior's—classification, is presented and discussed in detail. In an appendix, certain quotations from a paper by G. T. Prior are included for reference, and in exposition of some of the particulars of the forenamed

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00036.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00037.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

摘要:

ABSTRACTPrevious successful attempts to synthesize metallic meteorites are reviewed. The author also has been successful in synthesizing an octahedrite containing 27.7% nickel. Other alloys were prepared containing various amounts of iron, nickel, and cobalt, and 2 of these showed poorly developed Widmanstätten figures. The composition, heat treatment, hardness, and, in some cases, specific gravity of these alloys are given

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00038.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00041.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00042.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00043.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00044.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00045.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00046.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

摘要:

ABSTRACTMeteoriticists have long believed in the existence of areal anomalies in the horizontal distribution of meteorites. On the one hand, the significantly different proportions in which iron and stone meteorites are found in samples of thetotalmeteoritic populations of the eastern and western hemispheres have repeatedly called forth the statement that such an anomaly, having an origin somehow connected with geographical location, exists between the hemispheres. On the other hand, Högbom has conjectured that a similar areal anomaly, having its origin not in geographical location, but rather in the local selective depletion of native‐iron meteorite‐populations by the agency of man is found on comparing the meteoritic populations of the Old (or long‐inhabited) World and the New. This second partition of the globe into subregions is distinct from the separation into eastern and western hemispheres.The present paper critically subjects the evidence for these suggested anomalies to analysis, by use of the sampling theory developed in the study of discrete, 2‐fold populations. Such an approach is possible only because of the recent publication by Frederick C. Leonard and Boris Slanin17of invaluable compilations relating to the areal distribution of all recovered meteorites. On the basis of the exhaustive sampling data thus supplied, the following conclusions have been reached: Denote byWa meteoritic population derived from witnessed falls and byUsuch a population derived from unwitnessed falls; then no significant difference as regards the incidence of stony character exists between (1) theW's of the eastern and western hemispheres; (2) theU's of these hemispheres; (3) theW's of the Old and New Worlds; and (4) theU's of the same subregions. The analysis carried out makes clear also that current belief in areal anomalies stems from the logically indefensible practice of lumping together theUandWpopulations of each of the distinct geographical areas

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1948.tb00047.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY