178 Fretp Museum oF NaturaL History — GEo.oey, Vor. [Il. 
13. Canyon Diablo. Florence: Am. Jour. Sci., 1895 -(¢)i) xiao 
tin-white, flexible plates. Calculated to 100 after deduction of 3.60% 
schreibersite. 
14. Wichita Co. Cohen and Weinschenk: Ann. Wien Naturhist. Mus., 1891, 
vi, 155. Isolated by dilute HCl. Calculated to too after deduction of 
schreibersite. 
15. Chupaderos. Manteuffel: Ann. Wien Naturhist. Mus., 1892, vii, 150. 
Brittle, tin-white plates. Isolated by HCl. Calculated to 100 after 
deducting schreibersite. 
16. Toluca.’ Cohen and Weinschenk: Ann. Wien Naturhist. Mus., 1891, vi, 
137. Tin-white, flexible plates. Isolated by HCl. Calculated to 100 
after deducting schreibersite. 
17. Canyon Diablo. Fahrenhorst: Ann. Wien Naturhist. Mus., 1900, xv, 
376. Thin, flexible plates partly appearing made up of many lamelle, 
light-yellow or grayish. Schreibersite, 2.34% deducted. 
18. Glorieta Mountain. Cohen and Weinschenk: Ann.Wien Naturhist. Mus., 
1891, vi, 137. Tin-white. flexible, grouped plates. Isolated by HCl 
Calculated to roo after deducting schreibersite. 
19. Bischtttbe. Cohen: Ann. Wien Naturhist. Mus., 1897, xii, 54. Large, 
flexible plates with included schreibersite. Isolated by HCl. 
20. Penkarring Rock. Fletcher: Min. Mag., 1899, xii, 174. Thin, flexible 
plates. Analysis calculated to 100 after deducting 4.18% schreibersite. 
Medwedewa. Berzelius: Pogg. Ann., 1833, xxxiii, 133. Analysis of 
skeleton material left behind after dissolving in HCl. 
22. Beaconsfield. Sjéstr6m: Monatsberichte Berlin Akad., 1897, ro41. Tin 
to silver-white, lustrous plates. Iron determined by difference. 
to 
ta 
The analyses, as will be observed, show variations of composition 
from Fe, Ni to Fe Ni. While this variation is a wide one it is evident 
that it 1s between certain limits, and that it would be incorrect to 
ascribe too indefinite a composition to tenite. 
TIMES OF FALL OF METEORITES. 
The following study has already been published in part by the 
author.* In the present paper the records are given in full and con- 
tributions to the subject by other authors are incorporated. 
The times of fall of meteorites may be studied with reference to 
the year, month, day, and hour. The yearly falls should give evidence 
as to the frequency of the occurrence and exhibit periods if any occur. 
The falls by months should show the relation of meteorites to well- 
established star showers and the portion of the earth’s orbit where 
meteorites are most frequently encountered. The falls by days should 
exhibit periodicity if any exists and variation in the uniformity of 
supply. Finally the hours of fall should give the direction of move- 
*Am. Jour, Sci., 1910 (4), 20, 211-29 
