A CKNO WLEDGMENTS. 8 7 1 



— -Geology of Baltimore and Vicinity. Part I. Crystalline Rocks. 77-124 pp., 

 1 map. Part II. Sedimentary Rocks (by N/H. Darton). 125-139 pp., 1 map. — 

 Extr. Guide Book of Bait., Feb., 1892. 



— Modern Petrography. 35 pp. 



— Geological and Petrographical Observations in Southern and Western Nor- 

 way. 551-553 pp. — Bull. Geol. Soc. Am., Vol. I. 



— Notes on the Eruptive Origin of the Syracuse Serpentine. 533-534 pp. — 

 Bull. Geol. Soc. Am., Vol. I. 



— The Nickel and Copper Deposits of Sudbury District, Canada (by Robert 

 Bell). 125-137 pp. — Bull. Geol. Soc. Am., Vol. II, 



— On the Serpentine of Syracuse, N. Y. 232-233 pp. — Sci., Vol. IX, No. 214, 

 March 11, 1887. 



— The Microscope and the Study of the Crystalline Schists. 2 pp. —Sci., Vol. 

 XXI, No. 518, Jan. 6, 1893. 



— On a Geological Excursion iu the Northern Appalachian Chain. 27-28 pp. — 

 Johns Hopkins Univ. Cir., Vol. X, No. 84. 



— Maps of the Territory included within the State of Maryland, especially the 

 vicinity of Baltimore. 37-45 pp.— Johns Hopkins Univ. Cir., Vol. XII, No. 103. 

 Winslow, Arthur. 



— The Geology and Mineral Products of Missouri. 14 pp., 111. 

 {Further acknowledgments of pamphlets already received will be made in the next number.) 



