EEPORT OF NATIONAL MUSEUM, 1908. 



135 



Smith, John D., Catalogue of botan- 

 ical library of. (See under Bibliog- 

 raphy. ) 



Underwood, Lucien M. 

 William R. Maxon.) 



( See under 



Wight. E. F. A new larcli from 



Alaslia. 



SmWisoniiiu Misc. CoUs., l, 

 Quar. issue. Pt. 2, No. 1728, 

 July 10, 1907, p. 174, pi. 



XVII. 



GEOLOGY AND MINERALOGY. 



Bassler, Kay S. Cement and cement 

 materials. 



Mineral Resources of Virginia. 

 1907. pp. 86-167. pis. xi-xx. 

 This paper deals with the general 

 geology, geography, and stratigraphy 

 of western Virginia, the economic 

 value of the various cement horizons 

 and distribution of cement materials. 

 Details of localities, analyses, maps, 

 and a number of illustrations accom- 

 pany the report. 



Howell, Edwin E. (with Wirt Tas- 

 sin). The Williamstown meteorite. 

 Amer. Jour. Sci., 4th ser.. xxv. 

 No. 145, Jan., 1908. pp. 49. 50, 

 1 fig. 

 Mr. Howell gives the circumstances 

 of the finding of the iron, its weight 

 and general appearance, stating that 

 it is a thin, flat, rectangular mass 

 weighing about 31 kg., and was 

 found in 1892, near Williamstown. 

 Grant County, Ky. Mr. Tassin de- 

 scribes the iron metallographically 

 as a typical octahedrite of medium 

 coarseness. Bands of kamacite, 

 taenite, and plessite are visible on 

 the etched surfaces, with occasional 

 nodules of troilite, some of which 

 contain carbonaceous matter and 

 are surrounded by a skin of schrei- 

 bersite. His analysis is as follows : 

 Fe, 91.54 ; Xi, 7.26 ; Co, 0.52 ; Cu. 

 0.03: Cr, 0.05; P, 0.12; S, 0.17; C, 

 0.004 ; Si, trace ; total, 99.694. 



The Ainsworth meteorite. 



Am. .Jour. Sci., 4th ser., xxv. 

 No. 146, Feb., 1908, pp. 

 105-107, figs. 1, 2. 

 Mr. Howell gives the weight of 

 the mass as 10.65 kg., with a den- 

 sity of 7.85, and states that it was 

 found in 1907 about 6 miles north- 

 west of Ainsworth, Brown County, 

 Nebr. Mr. Tassin describes the 

 meteorite as being triangular in out- 

 line and having a well-marked octa- 

 hedral fracture on one edge ; in fact, 

 the three edges of the section stud 

 led approximate three directions of 

 an octahedron, with the cut surface 

 forming a fourth. In structure the 

 iron is unique, the etched surface 



Howell, Edwin E. — Contmued. 



showing octahedral lamellae of the 

 largest size, in which appear very 

 minute areas which also possess a 

 well-deflned lamallar structure and 

 show the three characteristic alloys. 

 Troilite occurs in irregularly shaped 

 segregations, which contain more or 

 less carbon, with grains of nickel, 

 iron, and phosphide of iron, and as a 

 whole surrounded by a thin skin of 

 schreibersite. Rhabdite is abun- 

 dantly present. The analysis gives : 

 Fe. 92.22 : Ni. 6.49 ; Co." 0.42 ; Cu, 

 0.01 ; P, 0.28 : S, 0.07 : Cr, 0.01 ; SI, 

 0.049; C. 0.09; Sp. gr., 7.85. 



Merrill, George P. The meteor crater 



of Canyon Diablo, Ariz. : its history, 



origin, and associated meteoric irons. 



Smithsonian Misc. Colls., L, 



Quar. issue, Pt. 4, No. 1783. 



.Tan. 27, 1908, pp. 461-498. 



pis. LXi-Lxxv, figs. 124-120. 



The character of the work is fully 



indicated by the title. The paper is 



the result of studies made on the 



crater under the auspices of the 



Smithsonian Institution in May, 1907. 



■ and Tassin. Wirt. Contribu- 



tions to the study of the Canyon 



Diablo meteorites. 



Smithsonian Misc. Colls., l, 

 Quar. issue, Pt. 2, No. 1731, 

 Sept, 12, 1907, pp, 203-215, 

 pis, xviii-xxi, figs. 48. 49, 

 Doctor Merrill first discusses at 

 length the " shale balls " and iron 

 shale distributed about the crater 

 of Coon Butte, Ariz., from the view 

 point of their bearing on its origin. 

 The shale balls and iron shale are 

 held to have been derived from the 

 same mass. This iron shows cer- 

 tain differences from the typical 

 iron of the Canyon Diablo meteor- 

 ites. This difference is explained 

 by the suggestion that the original 

 meteoric mass was very heterogene- 

 ous in character, with segregation 

 masses rich in chlorides, phosphides, 

 etc., which might easily have sepa- 

 rated along their lines of contact 

 from the more homogeneous portions 

 and have from their verv nature 



