124 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
LeRoy, Osmond Edgar. 
1565. On surveys in New Westminster district and Texada Island, B. C. — 
Canada Geol. Survey, Summ. Rept. for 1906, pp. 31-34, 1906. 
Gives notes on the geology and ore deposits. 
1566. The Marble Bay copper deposit. — Canadian Mill. Jour., vol. 28, no. 9 
(new ser., vol. 1, no. 7), pp. 200-202, June 15, 1907. 
Describes the general geology, and the occurrence, relations, and origin of copper 
deposits on Texada Island, British Columbia. 
Leuschner, A. O. r , 
1567. The [San Francisco | earthquake. — Min. and Sci. Press, vol. 92, p. 274, 
April 28, 1906. 
Describes the earthquake shocks: time, character, etc. 
Leverett, Frank. 
1568. DrumlinsJn the Grand Traverse region of Michigan. — Abstract: Geol. 
Soc. America, Bull., vol. 16. p. 577, 1906. 
1569. Flowing-well districts in the eastern part of the northern peninsula 
of Michigan.— F. S. Geol. Survey, W.-S. and Irrig. Paper no. 160. pp. 29-53, 
1 pi., 1906. 
1570. Dr. I. C. Russell [died May 1, 19061.— Michigan Acad. Sci., Bull., 
vol. 3, no. 1. pp. 1-2. May. 1906. 
A brief account of bis work. 
1571. Geological conditions of municipal and institutional water supplies in 
Michigan.— Michigan Acad. Sci.. Eighth Kept., pp. 99-105, 1906. 
1572. The glacial deposits of Indiana. — In Dryer's Studios in Indiana Geog- 
raphy, pp. 29-40, 2 pis., 11)07. See no. 745. 
Leverett, Frank, and others. 
1573. Flowing wells and municipal water supplies in the southern portion 
of the southern peninsula of Michigan. — F. S. Geol. Survey, W.-S. and Irrig. 
Paper, no. 182. 292 pp.. 5 pis.. 11 figs., 1906. 
1574. Flowing wells and municipal water supplies in the middle and north- 
ern portions of the southern peninsula of Michigan. — F. S. Geol. Survey, W.-S. 
and Irr. Paper no. 183, 393 pp., 5 pis., 69 tigs.. 1907. 
Levy, Louis Edward. 
1575. In memoriair) : Angelo Heilprin. — Franklin Inst. Jour., vol. 164, no. 5, 
pp. 313-326, 1 pi. (port.), November, 1907. 
Lewis, J. Volney. 
1576. An Ontario lead deposit. — Econ. Geology, vol. 1, no. 7, pp. 682-687, 
2 tigs.. 1906. 
Describes the location and geology of a lead vein in Hastings County. Ontario, and 
discusses the origin of the ore. 
1577. The double crest of Watchung Mountain. — Jour. Geology, vol. 15, no. 1, 
pp. 39-45, 3 figs., 1907. 
Describes the physiographic features of the region, discusses briefly previous explana- 
tions, and explains more fully another hypothesis to account for the parallel crests. 
1578. Copper deposits of the New Jersey Triassic. — Econ. Geology, vol. 2, 
no. 3. pp. 242-257, 1 pi., 1 fig., 1907. 
1579. Structure and correlation of Newark trap rocks of New Jersey.— 
Geol. Soc. America, Bull., vol. 18, pp. 105-210, 2 pis.. 1907. 
1580. The origin and relations of the Newark rocks. — New Jersey Geol. Sur- 
vey, Ann. Rept. State Geol. for 1906, pp. 99-129, 2 pis., 4 figs., 1907. 
Discusses tbe character and origin of the Newark sediments, the geologic relations and 
origin of the trap rocks, and subsequent deformation and erosion. 
