weeks.! PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1896. 63 
455 Luquer (Lea Mel.). Optical mineralogy. 
School of Mines Quart., vol. xvii, pp. 435-469, 29 rigs., 1896. 
Gives a brief sketch of elementary optics for optical mineralogy and 
describes the use of the petrographic microscope and the manner of 
studying the microscopic and optical characters of minerals. 
450 and Ries (Heinrich). The " augen "gneiss area, pegmatite 
veins and diorite rocks at Bedford, N. Y. 
Am. Geol., vol. xviii, pp. 239-258, pis. viii-ix, figs. 3-4, 1896. 
Describes the characters of the pegmatite veins and diorite dike rocks, 
and the petrographic characters of the augen-gneiss, schists, and diorites. 
Reviews the literature on the origin of augen-gneiss. 
457 Lyman (Benjamin Smith). Note on the trap rock of the Pali- 
sades. 
Am. Jour. Sci., 4th ser., vol. i, p. 149 (f p.), (communicated), 1896. 
Brief note on the intrusive character of the trap of the Palisades. 
458 Folds and faults in Pennsylvania anthracite beds. 
Am. Inst. Mg. Engrs., Trans., vol. xxv, pp. 327-369 and 1010-1011, 
pis. i-xxxiv, 1896. 
Gives a brief discussion of the folds and faults of the Appalachian 
region of Pennsylvania, illustrated by 177 cross sections made by the 
Pennsylvania Geological Survey. 
M. 
459 McCalley (Henry). On the Tennessee Valley region [Alabama]. 
Ala. Geol. Surv., Rept. on the Valley regions of Alabama, Pt. I, 436 pp., 
pis. i-ix, figs. 1-4, 1896. 
Describes the physiography of the region, the general features of the 
Silurian, Devonian, Carboniferous, Cretaceous, and Tertiary strata, and 
the occurrence of coal, iron, asphaltum, petroleum, natural gas, build- 
ing stone, abrasive materials, clay, and mineral waters, and gives local 
geologic details by counties. 
460 The limonites of Alabama geologically considered. 
Eng. and Mg. Jour., vol. lxii, pp. 583-584, 2 pis., 1896. 
Describes the occurrence of the limonite deposits of Alabama. 
401 McCarn (H. L.). Pine Creek district, Colorado. 
Mining and Scientific Press, vol. lxxiii, p. 173, 1896. 
Describes the general geology of the region and the occurrence and 
character of the gold ores. 
462 McConnell (R. G.). Report on an exploration of the Finlay and 
Omenica rivers [British Columbia]. 
Canada Geol. Surv., new ser., vol. vii, Rept. C, 40 pp., 2 pis , 1896. 
Describes the physiography of the region and includes notes on the 
occurrence of Archean, Cambrian, Carboniferous, Juratrias, Tertiary 
rocks, and Glacial deposits. 
463 Glacial deposits of southwestern Alberta in the vicinity of the 
Rocky Mountains. 
See Dawson (G. M.), No. 175. 
