INDEX. 



751 



Oils from lignite, 41, 42. 



Old Alcalde furnace, 14, 293, 294. 



Onyx, 700, 710. 



Orange sands, lxxxi, lxxxii, 263, 319. 



Ores — 



Bessemer, 174, 613. 



bismuth, lxx. 



copper, lxii, 449-455, 577-583, 71.2. 



gold, lxvii, 573, 713. 



iron, lvii, 7, 28, 74, 96, 100, 164, 175, 

 186, 205, 228, 247, 259, 279, 291, 296, 

 308, 319, 320, 608-636, 711. 



lead, lxv. 583-594. 



manganese, lxx, 251, 602-607, 713. 



mercury, Ixix. 



nickel, 712. 



silver, lxvii, 575, 713. 



tin, lxix, 595, 713. 



zinc, lxv, 577, 601, 712. 

 Ornamental stones and gems, lxxi, 700, 710. 



agate, lxxii, 700. 



alabaster, lxxiii, 457. 



amazon stone, 700. 



amethyst, lxxi. 



beryl, lxxi. 



carnelian, lxxi. 



chalcedony, lxxii. 



crystal quartz, lxxi. 



garnet, lxxi. 



jasper, lxxii. 



moss agate, lxxi, 700. 



pearls, lxxiii. 



puddingstone, lxxiii. 



rose quartz, lxxi. 



sardonyx, lxxii. 



serpentine, lxxiii, 689, 711. 



silicified wood, lxxiii. 



smoky quartz, lxxi, 7 1 0. 



thetis hairstone, lxxi. 



tourmaline, lxxii, 596, 598. 

 Orthoclase, 598. 

 Ostrea, sp. ind., 223. 



sellseformis, 277, 285. 



salinensis, 305. 

 Owen, John, xliv. 

 Oxford Postoffice, 619. 

 Oxford ore band, 618. 

 Oxide of tin, lxix. 



Packsaddle Mountain, liii, lxi, lxx, 605, 615, 



652. 

 Packsaddle series, 563. 

 Paint Creek, lxiii. 



Paints, materials for, lxxvi, 231, 288, 505. 

 Paisano Mountain, 671. 

 Paleontology, Carboniferous, 391-394. 



necessity tor knowledge of, xxix. 



Permian, 413, 419. 

 Paleozoic rocks, lxxix, lxxxiv, 21, 556, 563, 



659. 

 Palestine, xliv, 13, 303, 307, 308, 309, 314, 



315, 605. 

 Palo Duro Canyon, 433. 

 Palo Pinto, xxvi, c, 461. 



County, c, 374, 461, 462, 469, 521-534. 



Panola County, xxiii, cii, 8,. 28, 225-243, 251. 

 Paraffine, 40. 



Parker County, c, 374, 469, 519. 

 Parlin Bros.' mine, 693. 

 Parry, C. C, on geology of Rio G-rande Val- 

 ley, 674. 

 Patroon, 248. 

 Pearls, lxxiii.. 

 Pearsall, 39. 



Pecan Bayou, xxvi, xli, c, ci. 

 Pecan Creek, lxiii, lxiv, 574, 576, 579, 580, 



615, 647. 

 Pecos City, xxvi, lv, lxxxvii, 434, 463. 

 Pena Colorado Mountains, 670, 672, 686. 

 Pena Negras Mountains, 670, 672. 

 Penrose, R. A. P., Jr., xxiii, xxx, cv, 8, 76, 



204, 207, 210, 225, 287, 289, 291, 304, 



307, 320, 324. 

 Perl, Leon, xcii. 

 Permian area, 394. 



conformability, 397. 



copper ores, lxii, 449. 



determination of age of strata, 411. 



difference between Permian and Car- 

 boniferous, 419. 

 and Triassic, 420. 



dip of strata, 430. 



divisions, 400. 



Clear Fork beds, 401. 

 Double Mountain bed, 402. 

 Wichita beds, 400. 



gypsum beds, xlvii, lvii, 455. 



iron ores, lviii, 455. 



limestones, liv, 463. 



list of fossils, 415-419. 

 batrachia, 416. 

 pisces, 416. 

 reptilia, 417. 



literature, 398. 



partings traced, xxv. 



paleontology, 413-419. 



plaster paris, lvii, 459. 



relation to adjacent strata, 395. 



salt, lxxvii, 444. 



sections, 371, 402-411. 



soils, 476. 



thickness, 398. 



Wichita beds, xcix, 400, 419, 420. 

 Perry, H. P., 11. 

 Perry, Josiah D., 11. 

 Phacoceras dumbli, n. s., 347, 393. 

 Philleo Iron Works, 12. 

 Photogene, 41. 

 Pierce, J. B., 273. 

 Pig iron, 15, 16, 33, 295. 

 Pilot Hill, 190. 

 Pilot Knob, lxxvi, lxxxi. 

 Pine Hill, 189, 227, 260. 

 Pipe foundry, 17. 

 Plaster paris, lvii, 459, 700. 

 Plumbago, see Graphite 

 Polk County, lxxi, lxxxiii. 

 Pond, Capt. G-eo. E., 340. 

 Ponderosa clays, 304, 305. 

 Ponderosa marls, 22, 24, 304, 316. 

 Pontotoc, 601. 



