NO. 2243. THE PLAINVIEW, TEXAS, METEORITE— MERRILL. 505 



A photomicrograph from this is shown in figure 2 on plate 80, figure 

 1 being of the same magnification as those on plate 79 and figure 2 

 more highly magnified. 



The above-mentioned facts, together with the presence of abun- 

 dant chondrules of polysynthetic pyroxene in the dark portion and 

 their absence in the light, lead me to the conclusion that the stone 

 is a true breccia composed of fragments of a spherical chondrite and 

 a veined intermediate chondrite like that of Dhurmsala. The con- 

 fused, obscure character of the brecciation may have been due to the 

 friable, sandy nature of one of the stones and the compression to 

 which the mass has been subjected. If not a true breccia, the stone 

 certainly shows, in its different parts, greater structural and miner- 

 alogical variations that are usually expected in one and the same 

 mass. 



* It may be mentioned incidentally that Mr. Lazard Cahn writes 

 me he has three individuals of a chondritic stone, weighing altogether 

 about 15 pounds, from the Plainview locality, and which doubtless 

 belong to the same fall. This being the case, the total weight given 

 in my previous paper must be increased to " about " 31 kilograms. 



