26 
41 Brown (E. G.). Tlie Georgetown mining district, Montana. 
Eng. and Mg. Jour., vol. lviii, pp. 345-346. 
Notes on the ore deposits of this region. 
42 Bryson ( Jolm). Lake Ronkonkoina and otlier glacial features of 
Long Island [New York]. 
Am. Geol., vol. xiii, pp. 390-392. 
Describes the depression in which this lake occurs and discusses the 
evidences hearing on the amount of elevation and subsidence the island 
has undergone during and since the Glacial period. 
43 Bush (E. Ilenshaw). The Sudbury nickel region | Ontario]. 
Eng. and Mg. Jour., vol. lvii, pp. 245-246. 
Describes the topography of the region, names the rock varieties in 
which the nickel and copper occurs, and describes the general occur- 
rence of the nickeliferous pyrrhotite and chalcopyrite. Discusses the 
origin of the deposits. 
c. 
44 Cadell (H. M.). [Classification of Pleistocene deposits.] 
Int. Cong. Geol.,Compte Rendu, 5th session, p. 198 d p.). 
Describes glacial phenomena of Scotland. 
44« California, State Mining Bureau. Eleventh Report of the State 
Mineralogist. 
Abstract: Am. Nat., vol. xxviii, pp. 335-336 (h p.). 
Noticed in Bibliography and Index for 1892 and 1893. 
45 Call (Tv. Ellsworth). On the induration of certain Tertiary rocks in 
northeastern Arkansas. 
Ind. Acad. Sci., Proc, 1893, pp. 219-224, with map. 
Describes the outcrops of sandstone in this region, hitherto referred 
to the Potsdam, but which the author considers to be Tertiary. Dis- 
cusses the causes of the induration of these sandstones. 
46 Calvin (Samuel). On the geological position of Bennettites daco- 
tensis Macbride, with remarks on the stratigraphy of the 
region in which the species was discovered. 
Am. Geol., vol. xiii, pp. 79-84; Iowa Acad. Sci., Proc, vol. i, pt. iv, 
pp. 18-22. 
Describes the stratigraphic relations of the formations in the portion 
of the Black Hills in which Bennettites dacotensis were found and 
concludes that they represent the Dakota Cretaceous 
47 On a new horizon and some new localities for friable sandstone 
in which the grains are enlarged by secondary deposition 
of silica in optical continuity with the original nucleus. 
Am. Geol., vol. xiii, pp. 225-227. 
Describes sandstone beds associated with the Lower Magnesiar 
limestone in Iowa, which are thought to bo an equivalent cf the New 
Richmond sandstone of Minnesota and Wisconsin. 
