68 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [»ull.1«2 
549 Merrill (F. J. H.). The origin of the serpentine in the vicinity of 
New York. 
N. Y. State Mus., 50th Ann. Rept., vol. i, Appendix B, pp. 32-44, pis. 
vi-viii, 1898. 
Discusses the origin of serpentine and describes its occurrence in the 
vicinity of New York. Includes a list of papers consulted 
550 Boad materials and road building in New York. 
N. Y. State Mus., 50th Ann. Rept., vol. i, Appendix, pp. 91-131, pis. 
i-xiv, 1898. 
See Bibliography and Index for 1897, No. 427. 
551 Geology of the vicinity of Greater New York. 
Am. Geol., vol. xxi, pp. 72-73 (£ p.), 1898. 
Contains summary of paper read before the New York Academy of 
Sciences. 
552 Merrill (George P.). Rocks, rock-weathering, and soils. 
411 pp., Macmillan & Co., New York, 1897. 
Review, Jour, of Geol., vol. vi, pp. 208-210, 1898. 
553 The physical, chemical, and economic properties of building 
stones. 
Md. Geol. Surv., vol. ii, pp. 47-123, pis. iv-vi, figs. 1-18, 1898. 
Describes the geologic occurrence, weathering, and methods of test- 
ing building stones, with special reference to the Maryland building 
stones. 
554 See Diller (J. S.), No. 234. 
555 Merriman (Mansfield). The slate regions of Pennsylvania. 
Stone, vol. xvii, pp. 77-90, 5 figs., 1898. 
Describes the occurrence and character of slate in Pennsylvania. 
55G See Day (W. C), No. 227. 
557 Merritt (William Hamilton). Gold-bearing reefs and placers of 
northern British Columbia. 
Federated Can. Mg. Inst., Jour., vol. iii, pp. 103-112, 4 figs., 1898; Can. 
Mg. Rev., vol. xvii, pp. 74-78, 4 figs., 1898. 
Contains notes on the placers and placer mining of the region. 
558 Merrivak (Walter). Barbados Manjak. 
Eng. and Mg. Jonr., vol. lxvi, pp. 790-791, 1898. 
Describes the occurrence and character of asphaltum on the island 
of Barbados in the West Indies. 
559 Mickle (G. B.). Mineralogical notes on Sudbury anthracite 
[Ontario]. 
Can. Inst., Proc, new ser., vol. i, pp. 64-65, 4 figs., 1897. 
Describes character and occurrence of a coal-like substance. 
560 Miller (Arthur M.). The hypothesis of a Cincinnati Silurian 
island. 
Am. Geol., vol. xxii, pp. 78-85, 1898. 
Discusses the evidence bearing on the theory of the Cincinnati uplift. 
