454 
PETROLOGY: G. P. MERRILL 
Proc. N. a. S. 
over it irregularly, indicating a condition of stress. Here, as in the last, 
the border is not sharply demarked from the ground and it is often im- 
possible to state if a certain crystal particle belongs to one portion or the 
FIG. 7 
other. It should be noted that this stone is a crystalline spherulitic 
chondrite. According to Tschermak, in chondrules of this nature the 
olivine bars are sometimes interlaminated with plagioclase (e.g., in the 
Dhurmsala stone) .V In the porphyritic form shown in figure 8 from the 
FIG. 8 
Tennasilm stone, the granular ground abuts sharply against the black 
glass of the chondrule with only on one side a manifested tendency to 
penetrate into and beyond the border. It is to be noted that the enstatite 
