448 T. T. QUIRKE 



the light ceased after disruption, proving that the velocity was 

 lessened rather than increased, and indicating that the meteo- 

 rite fell apart but did not explode. Such a disruption, of itself, 

 should not decrease the velocity of flight, and except for the 

 influence of the larger surfaces exposed, before noted, the meteor- 

 ite fragments should have continued to burn after disruption as 

 before. The fact that they did not burn again indicates that the 

 velocity of the meteorite was so decreased at the time of disrup- 

 tion that the exposure of intensely cold surfaces from the interior 

 of the meteorite, added to the increased damping effect of the 

 atmosphere on larger surfaces, was sufficient to prevent the intense 

 temperatures necessary for burning. Thereafter, the velocity of 

 the meteorite must have decreased progressively as it entered 

 denser and denser air until it reached the surface. Although not 

 heated enough by this obstruction to burn brightly after disruption, 

 the meteorite certainly was heated enough to cover the larger pieces 

 with a heavy fused crust, and to form a thinner crust on the 

 smaller pieces. The smaller pieces had a thin crust both because 

 they went less rapidly than the larger pieces through the air, 

 and because they went a shorter distance through the atmosphere 

 after disruption. 



Many residents of the district in which the meteorite fell have 

 assisted greatly in collecting data and specimens. In addition to 

 those especially mentioned above, Mr. John Muggli, of Richardton, 

 has extended many courtesies and has given much help. Mr. 

 W. A. Force, of the Photo Art Shop, Minneapolis, has given of 

 his time and experience in securing the photographs from which 

 the illustrations are made. Funds and opportunity to investigate 

 the phenomena of the fall and to collect specimens for the museum 

 were provided by the University of Minnesota. 



A new fall has been named, classified, and described. The 

 phenomena of fall have been reported more fully than usual, and 

 certain conclusions in regard to the direction of flight, velocity, 

 and consequences of disruption of the meteorite seem to follow 

 reasonably. The meteorite is noteworthy for the concentration 

 of metallic iron and nickel and iron sulphide in veins. The 

 discovery of visible, metallic copper in a meteorite is announced. 



