摘要:

ABSTRACTTwo varieties of iron sulfide from one of the Gibeon (Bethany), Great Namaqualand, South Africa, irons are described and analyses are given. One variety is dark in color, soft, nonmagnetic, and nickel‐free, while the other is lighter‐colored, hard, polishable, strongly magnetic, and exceedingly rich in nickel. An analysis of a mixture of iron sulfide and daubréelite from another of the same group of meteorites also is given. Sulfides from Canyon Diablo, Arizona, and Xiquipilco (Toluca), Mexico State, Mexico, also are described and analyses for these too are g

ISSN:0096-2813    

DOI:10.1111/j.1945-5100.1945.tb00053.x

出版商:Blackwell Publishing Ltd    

年代:1945

数据来源: WILEY

ISSN:0096-2813    

DOI:10.1111/j.1945-5100.1945.tb00054.x

出版商:Blackwell Publishing Ltd    

年代:1945

数据来源: WILEY

摘要:

ABSTRACTAttention is called to the recent explanation of the line spectrum of the solar corona. Most of the lines have been ascribed to highly ionized atoms of iron and nickel.

ISSN:0096-2813    

DOI:10.1111/j.1945-5100.1945.tb00055.x

出版商:Blackwell Publishing Ltd    

年代:1945

数据来源: WILEY

摘要:

ABSTRACTIt is suggested that attempts may soon be made to send rockets to the Moon and that eventual success may be achieved. The writer believes that we shall not have to wait for the hazardous transportation of human cargo in order to begin lunar exploration; he believes that by attaching suitable explosives to rockets directed by remote control, fragments of lunar rock may be dislodged with sufficient violence to project them into the sphere of terrestrial gravitation and to cause them to arrive upon our planet. By means of world‐wide networks of observing stations, the landing particles could perhaps be located, collected, and studie

ISSN:0096-2813    

DOI:10.1111/j.1945-5100.1945.tb00056.x

出版商:Blackwell Publishing Ltd    

年代:1945

数据来源: WILEY