Part 46

Footnote 114:

Zirkel, Mikroskopische Gesteinstudien, Sitzung vom 12 März, 1863.

Footnote 115:

Julien and Wright, Geol. Surv. of Michigan, 2, 1873. Appendices A and C.

Footnote 116:

Dana, E. S., the Journal, =8=, 390–392, 1874.

Footnote 117:

Zirkel, Geological Exploration of the 40th Parallel; vol. VI, Microscopical Petrography.

Footnote 118:

Caswell, Microscopical Petrography of the Black Hills. U. S. Geog. and Geol. Surv. Rocky Mts. Rep. on Black Hills of Dakota, 469–527. The separate copies issued bear the imprint 1876; the complete report 1880.

Footnote 119:

Dana, E. S., Igneous Rocks in the Judith Mts. Rep. of Reconnaissance Carroll, Mont., to Yellowstone Park in 1875. Col. Wm. Ludlow, War Dept., Washington, 105–106.

Footnote 120:

Hawes, G. W., Rocks of the Chlorite Formation, etc., the Journal, =11=, 122–126, 1876. Greenstones of New Hampshire, etc, ibid., =12=, 129–137, 1876.

Footnote 121:

Hawes, G. W., the Journal, =21=, 21–32, 1881.

Footnote 122:

Brögger, Die silurischen Etagen 2 und 3, Kristiania, 1882.

Footnote 123:

The references for the papers alluded to, all of them in the Journal, are as follows:

Emerson, =24=, 195–202, 270–278, 349–359, 1882; ——, =23=, 302–308, 1882. Cross, =27=, 94–96, 1884; =31=, 432–438, 1886; =39=, 359–370, 1890; =41=, 466–475, 1891; =23=, 452–458, 1882. Iddings, =26=, 222–235, 1883; ——, =27=, 453–463, 1884; ——, =36=, 208–221, 1888; ——, =33=, 36–45, 1887. Williams, =31=, 26–41, 1886; =33=, 135–144, 191–199, 1887; =35=, 433–448, 1888; =36=, 254–259, 1888. ——, =34=, 137–145, 1887. Diller, =32=, 121–125, 1886; =37=, 219–220, 1889; ——, =33=, 45–50, 1887. Irving (=26=, 27–32, 321–322, =27=, 130–134, 1883; =29=, 358–359, 1885). Kemp (=35=, 331–332, 1888; =36=, 247–253, 1888; =38=, 130–134, 1889).

Footnote 124:

Zirkel, Lehrbuch der Petrographie, 2d ed., 1893.

Footnote 125:

Hunter and Rosenbusch, Ueber Monchiquit, etc., Min. petr. Mitth., =11=, 445, 1890. Rosenbusch, Ueber Structur und Class. der Eruptivgesteine, ibid., =12=, 351, 1891.

Footnote 126:

Iddings, Origin of Igneous Rocks, Bull. Phil, Soc. Washington, =12=, 89–213, 1892.

Footnote 127: