weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1904. 21 
iBecke (F.). 
1. Optische Orientirung des Albit von Amelia, Virginia. 
Tschermak's Min. u. Petrogr. Mitt., N. F., Ed. 19, pp. 321-335, 5 figs., 1900. 
Describes crystallographic features of an albite from Amelia, Virginia. 
: Becker (George F.). 
1. Construction of geophysical laboratory. 
Carnegie Inst, of Wash., Yearb. no. 2, 1903, pp. 185-194, 1904. 
2. Experiments on schistosity and slat}' cleavage. 
U. S. Geol. Surv., Bull. no. 241, 34 pp., 7 pis., 1904. 
Describes experiments to determine the cause of cleavage and schistosity in 
rocks, and discusses the results obtained. 
3. Present problems of geopnysics. 
Science, new ser., vol. 20, pp. 545-556, 1904; Eng. & Mg. Jour., vol. 78, pp. 
743-744, 1904 (in part). 
;Beecher (Charles E.). 
1. Note on a new Permian Xiphosuran from Kansas. 
Am. Jour. Sci., 4th ser., vol. 18, pp. 23-24, 1 fig., 1904. 
iBeede (J. W.) and Rogers (Austin F.). 
1. Coal Measure faunal studies. III. Lower Coal Measures. 
Kans. Univ., Sci. Bull., vol. 2, pp. 459-473, 1904. 
Describes the character and occurrence of lower Coal Measures formations and 
gives lists of fossils obtained from them. 
Beede (J. W.), Prosser (Charles S.) and. 
1. Cottonwood Falls folio, Kansas. 
See Prosser (Charles S. ) and Beede (J. W. ), 1. 
Bell (James Mackintosh). 
1. Economic resources of Moose River Basin [Ontario]. 
Ont. Bur. Mines, Rept., 1904, pt, 1, pp. 134-197, 21 pis., 1904. 
Includes observations on the occurrence, character, and geologic relations of 
pre-Cambrian, Paleozoic, and Pleistocene rocks and deposits, the physio- 
graphic features, and the economic resources. 
Bell (Ralston). 
1. How copper is produced. 
Mg. Rep., vol. 50, pp. 636-637, 662-663, 690-692, 1904. 
Includes notes upon the geologic occurrence of copper. 
Bell (Robert). 
1. Report on the geology of the basin of the Nottaway River. 
Can. Geol. Surv., Ann. Rept., new ser., vol. 13, 11 pp., 1 map, 1903. (Pub- 
lished separately, 1902.) 
Describes the character and occurrence of Laurentian and Huronian rocks in 
this region. 
2. Volcanic origin of natural gas and petroleum. 
Can. Mg. Inst., Jour., vol. 6, pp. 126-128, 1904. 
