摘要:

AbstractThis report relates to the finding and identification of the Pinto Mountains, Riverside County, California, chondrite (CN = 1161,337:), the 14th meteorite found in California, and the largest aerolite so far recovered in that state and preserved. A description is given of the surface features of the Pinto Mountains stone and also of the fault‐surfaces and the rich chondritic structure characterizing the interior of this meteorite. On the basis of the features described, it is concluded that Pinto Mountains is a crystalline spherulitic chondrite C(ck

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01351.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractAccounts of the fall, recovery, and identification of two stony meteorites that struck buildings in Japan are presented in this paper. The first such occurrence took place on the afternoon of March 31, 1938, in Gifu‐ken, where the Kasamatsu meteorite penetrated the roof of a shop. On the evening of November 20, 1949, the Kochi meteorite fell, penetrating the windowpane of a house in Kochi city. The results of detailed chemical and petrographical studies of the 710‐gm. Kasamatsu spherulitic chondrite will be published in the near future. The Kochi meteorite, which weighs less than 1.6 gm., is as yet undescribed because it has been impossible to obtain a sample of the small stone for analysis. This fact is the more regrettable since it is felt that a detailed study of the Kochi stone is desirable before this specimen is accepted without qualification as a meteor

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01352.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe circumstances of the discovery and recovery, on 1955 August 9, of what appears to be the fifth and, to date, the smallest‐known member of the famous Cape York, West Greenland, sideritic fall — a mass weighing 106 pounds — are detailed, together with a brief description of the specimen, in a letter received from Mr. William G. Melbourne, a U.C.L.A. alumnus and a member of the party that recovered the mete

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01353.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThis paper presents an account of the discovery of the giant Chinguetti (Adrar), French West Africa meteorite (CN = 0127,202:) and a history of the subsequent searches conducted in an attempt to relocate the mass. Suggestions are made for further investigation into the problem of the rediscovery of the meteorite thru the use of an air‐borne magnetometer

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01354.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

Abstract and IntroductionMeteoritic‐iron specimens are nearly always prepared for study by making a flat surface in a random direction, which seldom bears any definite relation to the crystallographic axes of the specimen. For some purposes a sphere would be preferable, but spheres are almost never prepared. The only ones known to me are one in the British Museum (Natural History)1and another described and figured by Goldschmidt.1,2A third is rumored to have turned up in a Los Angeles pawn shop, but I have not seen it. This scarcity of spheres is due possibly to the mistaken notion that they are difficult to prepare. That they are not difficult to make would seem to be demonstrated by the fact that I made one the first time I tried, even tho I had never used a metal lathe before. No special tools were require

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01355.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThis paper consists of two parts. In part “I. Terrestrial Relations,” the first three pages of Chapter 14 of Farrington'sMeteoritesare quoted and discussed, and four conclusions concerning the occurrence of minerals in meteorites are reached. In part “II. Minerals,” two additional secondary accessory or Class III meteoritic minerals are recognized and tabulated — the carbonate calcite and the sulfide millerite. The following three minerals also are commented on: chlorite, which is almost certainly not a true meteoritic mineral; pentlandite, which may eventually be discovered in meteorites; and “peckhamite,” which is doubtless nothing other than an intimate mixture of bronzite or hypersthene and olivine. Three types of minerals found in meteorites —cosmic, terrestrialized, andextraneous— are defin

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01356.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThis communication is a miscellany consisting of notes on “I. Formulas for the Meteoritic Silicates Expressed as Series of Oxides”; “II. Alternative Formulas for Other Meteoritic Minerals”; “III. On the Classificational Sequence of Meteorites”; and “IV. On the Form of the Aouelloul, French West Africa, Crater (CN

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01357.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractExperiments were performed by using 50‐caliber projectiles with different nose‐shapes to determine the amount of projectile energy expended in comminution of the target material when the target was limestone particles. The energy expended by the projectile in crushing the target material is characterized by Von Rittinger's number, which is the increase of surface area of target material per unit of energy expended in crushing. It has been found that, for a crushed limestone target, the energy expended in comminution is a definite fraction of the total kinetic energy of the projectile. This fraction was found to vary slightly for different projectile configurati

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01358.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractOrbital elements of the fireball of 1954 May 15 indicate that the meteorite that caused it was moving in a direct orbit of low inclination and moderate semi‐major axis but of high eccentricity. The intrinsic luminosity is estimated to have been 70 billion candlepower! The color of the meteor changed progressively along the visible path from blue‐green to

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01359.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe mean radiant of the Geminid meteor stream and its diurnal motion are determined from 118 visual radiants. The visual radiant at maximum (⊙ = 260°.6, 1950.0) lies at right ascension 112°.02, declination + 32°.00. The total daily motion is 47′ eastward. The visual radiant and motion agree well with the photographic data, but not with the radar.An activity curve is derived from 124 nights' observations. A rise to a sharp maximum and a rapid decline are shown. The stream is detectable over a 10‐day interval: the minimum visual stream‐width is about 2.3 × 107km. Some physical characteristics of the meteors also ar

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1955.tb01360.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY