Vol. 6, 1920 
PETROLOGY: G. P. MERRILL 
471 
by Klein, I can only say that I find no evidence, with a single possible 
exception, satisfactory to me, to bear out the idea. This exception occurs 
in the stone of Barratta, Australia, in one slide of which I find the spherulitic 
bodies shown in figure 1 , p. 451 . These are as sharply outlined and as easily 
detached from the matrix as any spherulites and so closely resemble the 
true spherulite from one of the acid glasses as on casual inspection to 
strongly suggest their similar nature. Indeed, I have thus far failed to 
find evidence to completely satisfy me that such would not be so classed. 
It is to be noted, however, that between crossed nicols these break up 
each into several more or less well-defined areas showing an illy defined 
structure and over each of which the dark cloud sweeps irregularly as 
the stage is revolved. They lack the definite radial structure of typical 
spherulites and never between crossed nicols show the black cross, though 
how much reliance can be placed upon this distinction, I am not prepared 
to say. They are sufficiently distinct from the other chondrules in the 
stone to suggest an entirely different mineralogical nature, but the amount 
of material at my disposal is not sufficient to allow a determination. 
Liversidge,^^ in his description, makes no mention of these peculiar 
forms. 
Finally with reference to Fermor's fused garnet theory it may be stated 
that in no case have garnets been proven to actually occur in meteorites, 
and further, did the chondrules so originate it would be a perfectly safe 
assumption that we should sometime and somewhere find residual traces. 
So far as my observation goes, no such cases are on record. 
^ Published by permission of the Secretary of the Smithsonian Institution. 
This paper is supplementary to the author's work on "Minor Constituents of 
Meteorites" made under a Grant from the J. Lawrence Smith Fund of the National 
Academy of Sciences (see Memoirs of the Academy, 14, 1916, pp. 1-29; 1919, pp. 
1-15; and these Proceedings, March and June 1915, April 1918, and January 
1919). 
2 Geschreibung u. Eintheilung der Meteoriten, etc, Abhand. d. K. Akad. Wiss. 
Berlin, 1863. 
3 See Farrington, Meteorites, p. 200. 
4 Or "globular," see Proc. Amer. Phil. Soc, 43, 1904 (238). 
^ See particularly Die Mikroscopische Beschaffenheit der Meteoriten, and Meteoriten- 
kunde, respectively. 
6 No attempt in these studies has been made to distinguish between enstatite and 
the ferruginous variety bronzite. 
7 Pogg. Ann., I I I, p. 384. 
8 Proc. Royal Soc., June 1864. 
9 Nature, London, April 5, 1877 (296). 
1° Die Triimmerstructur d. meteoriten, etc., Sitz. k. Acad. Wiss., Wien, 70, 1874 (4). 
11 Ibid., 71, 1875. 
12 Denk. Math. Natur. Classe kaiser. Akad Wiss, 39, 1878. 
13 Sitz. k. k. Akad. Wiss., Wien, 95, 1882 (205). 
1^ Geologic Experimentale , 1879 (530). 
