438 PROCEEDINGS OF BALTIMORE MEETING. 



Note on the so-called quartz-porphyry of Hollms Station, north of Baltimore: Ibid, 



32, July, 1884, p. 131. 

 On the paramorphosis of pyroxene to hornblende in rocks: Am. Jour. Sci., vol. 



xxviii, October, 1884, pp. 259-268. 

 Notice of J. Lehmann's work on the origin of the crystalline schists: Proc. Am. 



Assoc. Adv. Sci., vol. xxxiii, p. 405. 

 Keview of J. Lehmann's " Entstehung der altkrystallinen schiefergesteine " : Am. 



Jour. ScL, vol. xxviii, November, 1884, p. 392. 

 Dykes of apparently eruptive granite in the neighborhood of Baltimore : Johns 



Hopkins University Circulars, 38, March, 1885, p. 65. 

 The microscope in geology: Science, vol. v, March, 1885. 

 Hornblende aus Saint Lawrence county. New York ; Amphibol-anthophyllit aus 



der gegend von Baltimore ; Ueber das Vorkommen des von Cohen als " Hud- 



sonit" bezeichneten Gesteins am Hudson Fluss: Neues Jahrbuchfur Min., etc., 



vol. ii, 1885, p. 175. 

 Cause of the apparently perfect cleavage in American sphene: Am. Jour. Sci., vol. 



xxix, June, 1885, pp. 486-490. 

 A summary of the progress in mineralogy and petrography in 1885 : Keprinted 



from the Am. Naturalist for 1885. 

 The peridotites of the " Cortland t series," near Peekskill, on the Hudson river, 



New York: Am. Jour. Sci., vol. xxxi, January, 1886, pp. 26-41. 

 The gabbros and associated hornblende rocks occurring in the neighborhood of 



Baltimore, Maryland: Bull. No. 28, V. S. Geol. Survey, Washington, 1886, 78 



pp. and 4 colored plates. 

 Modern petrography: HeaMs Monographs on Education, no. 1, Boston, 1886, 35 pp. 

 On a remarkable crystal of pyrite from Baltimore county, Maryland : Johns Hop- 

 kins University Circulars 53, November, 1886, p. 30. 

 The norites of the " Cortlandt series," on the Hudson river, near Peekskill, New 



York: xim. Jour. Sci., vol. xxxiii, 3d ser., February and March, 1887, pp. 135- 



144 and 191-199. 

 On the chemical composition of the orthoclase in the Cortlandt norite : Ibid., p. 243. 

 On the serpentine of Syracuse, New York: Science, vol. ix, March 11, 1887, p. 232. 

 On the serpentine iperidotite) occurring in the Onondaga salt-group at Syracuse, 



New York: Am. Jour. Sci., vol. xxxiv, August, 1887, pp. 137-145. 

 Holocrystalline granite structure in eruptive rocks of Tertiary age. (Keview of 



Stelzner's " Beitriige zur Geologie der Argentinischen Republik") : Ibid., vol. 



xxxiii, April, 1887, p. 315. 

 Notes on the minerals occurring in the neighborhood of Baltimore : Baltimore, 



1887, 18 pp. 

 Note on some remarkable crystals of pyroxene from Orange county. New York : 



Am. Jour. Sci., vol. xxxiv, October, 1887, p. 275. 

 Rutil nach Ilmenit in verandertem Diabas. Pleonast (Hercynit) in Norit vom 



Hudson-Fluss. Perowskit in Serpentin (Peridotit) von Syracuse, New York : 



Neues Jahrbuch far Min., etc., vol. ii, 1887, pp. 263-267. 

 On a new petrographical microscope of American manufacture: Johns Hopkins 



University Circulars 62, January, 1888, p. 22; Am. Jour. Sci., vol. xxxv, Febru- 

 ary, 1888, p. 114. 

 On a plan proposed for future work upon the geological map of the Baltimore 



region : Johns Hopkins University Circulars 59, August, 1887, p. 122. 



