HofTraan.] 414: [ April 16, 



In Fig. 3, the main crystal has become almost entirely black with a 

 light core. The upper end now blends with the magnetite alongside of 

 it, and the pyroxene on the lower side has become sensibly darker, but 

 still leaves the small crystal of magnetite apparent. The angle of the 

 analyzer was not determined. 



In Fig. 4, with an angle of =b 135° from the first position, the appear- 

 ance is nearly the same as in Fig. 1 ; and in Fig. 5 as in Fig. 8. 



In Fig. 6, which was taken in the same position of the analyzer as Fig. 

 4, a new condition was iatroduced, viz. : a thin plate of selenite was 

 interposed over the slide and between polarizer and analyzer. The 

 effect is a general resemblance to Figs. 1, 2 and 4. 



These attempts to utilize the art of micro-photography, for the delinea- 

 tion of the facts as seen through a microscope of moderate power, are yet 

 crude and undoubtedly susceptible of very great improvement, and my 

 only excuse for offering them to the Society in their present unfinished 

 state, is the supreme importance of using every means in our power at the 

 present time to illustrate the conditions of structure of these micro-crys- 

 talline (once cryiito-crystalline, but now so no longer) igneous rocks ; 

 and the hope that the effort to enlist the pencil of the sun in these repro- 

 ductions, however imperfect it may be in its beginning, may be ulti- 

 mately successful. 



It has not been attempted in this paper to specify all the constituents 

 of these traps ; to do this a further laborious study of many more slides 

 would be necessary : but only to point out those of most frequent occur- 

 rence and of principal importance, which can be recognized in the photo- 

 graphic representations. 



ON CREMATION AMONG THE DIGGER INDIANS. 



By W. J. Hoffman, M. D. 



{Read before the American Pliilosopliical Society, April 16, 1875.) 



In my last communication, I described, in part, the funeral ceremony 

 of that sub-tribe of Pah-Utes inhabiting the vicinity of Spring Mountain, 

 Nevada, and in looking over my notes made in 1871-2, I find that cre- 

 mation was also practiced by the Digger Indians (Pah-Utes) living around 

 Marysville, Cal. I would here state, that as far as I have been able to 

 compare the language, or rather dialects, customs, beliefs, ethnolosy 

 etc., I am inclined to trace the various sub-tribes of Utes, Pah-Utes (in- 

 cluding Diggers) and Gosh-Utes, to one common type. Their bauds are 

 scattered over an extent of country, from the northern interior portion 

 of California, southward throughout that State to Owen's Lake, thence 

 irregularly eastward into Utah and Colorado, making a distance between 

 the two limits of about one thousand miles. The dialects are similar to 

 a great extent, except where they have adopted many Spanish words, and 

 these incorrectly pronounced. 



