78 The Americd}} Geologist. February, 1895 
LlSTOKTIlK i'UliMSIlKl) A\'()I!KS OK PuOK. (JkOKCK If. WlLMAMS. 
(Tlic m;iiii portion of this lisl is taken froni tin- ItlliHixjiuiphui HtipJcuix- 
leiiHix, issncd in IHlKi.) 
(tlauUopliHng't'stcini' aiis Xord-llalicn. Ncurs ,lalii-l)ii('li fiirMiii., clc. 
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Die Ei'iiptivucstcinc dcr (ii'<;cn(l xon 'I'rylxM'";' im Scliwarlzwald. Inau- 
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The synthesis of minerals and i-ocks. Kcs lew of Fouciue et- Michel- 
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p. 127. 
Relations of erystallography to chemistry. Am. Chi'm. Jour.. V, p. 
■J(jl. 
Harile crystals from DeKalb, N. Y. Univ. Uirc, 21), March, 1884, p. Ol. 
Preliminary notice of the gabbros and associated hornblende rocks in 
the vicinity of i'.alt imorc 11)., :!0, April, 1884, p. 7!). 
Note on the so-calh'd (pnirtz-porphyr} of Hollins Station, north of 
Baltimore. lb., .'!2, July, 1884, p. KM. 
On the paramorphosisof i)\ro.\ene to hoi-nblende in rocks. Am. Jour. 
Sci.. XXVIII, pp. 259-208, October. 1884. 
Noticeof J. Lehmaiin's work on the origin of the crystalline schists. 
Proc. Am. A.ssoc. Adv. Sci., XXXIII, p. 40."). 
Review of J. Lehmaiin's "Entslehung der altkrystallinen Schieferge- 
steine." Am. Jour. Sci.. XXVIII, p. :i!)2, November, 1881. 
Dykes of api)arent ly eru]ili\e granite in the neighborhood of llalti- 
more. Tniv. ('ire, :!8. March, 188."), ]). (i.i. 
The microscope in geology. Science. V, March, 188.1. 
Hornblende ausSt. Lawrence Co., N. Y.; Amphibol-aiithophyllit aus 
der gegend \ on Haltimore: Ueber das Vorkommen des von Cohen als 
"Hudsoiiit" l)e/,eichneten (iesteins am Hu<lson Fluss. Ntnies .Tahrbuch 
fur Min . etc.. 188."), II, )). 17."). 
Cause of the apparently perfect cleavage in .\merican spliene. Am. 
Jour. Sci., XXIX, pp. 480 490, June, 188."). 
A summary of the progress in mineralogy and petrography in 188."). 
Reprinted from the Am. Naturalist for 188."). 
The peridotiles of the '"Cortlandt Series" near Peekskili on the Hud- 
son river, X. "*»'. .\m. Jour. Sci., XXXI. pp. 20-41, .lanuary, 188(i. 
The gabbros and associated hornblende rocks occurring in the neigh- 
borhood of Baltimore, Md. Bulletin V. S. Geol. Sur\cy. No. 28, Wash- 
ington, 188(); 78 i)p. and 4 colored plates. 
Modern petrography. Ileath's Jlonographs on I'jducatioii. No. 1, ;i") 
pp., Jioston, 188(i. 
On a remarkable crystal of pyrile from Itallimore Co.. Md. Cniv. 
Circ, 7^^. November. 188(i. p. :iO. 
The norites of the ■'( 'ortlandt Series'" on t he Hudson river, near Peeks- 
kill, N. Y. Am. Jour. Sci., H, X.XXIII. pp. i:;.".-144 and 191-199. Febru- 
ary and M.-irch. 1887. 
On the chemic;il comixisilion of I heortlioclase in t he Cortland t norili'. 
lb., p. 2t:!. 
