publications: annual reports. 121 
Fifth Annual Report of the United States Geological Survey — Continued. 
Requisite and qualifying conditions of artesian wells, by T. C. Chamberlin, pp. 125-173, pi. xxi. 
Preliminary paper on an investigation of Archean formations of Northwestern States, by R. D. 
Irving, pp. 175-242, pis. xxii-xxxi. 
The gigantic mammals of the order Dinocerata, by O. C. Marsh, pp. 243-302. 
Existing glaciers of the United States, by I. C. Russell, pp. 303-355, pis. xxxii-lv. 
Sketch of paleobotany, by L. F. Ward, pp. 357-452, pis. lvi-lviii. 
Index, pp. 453-469. 
Sixth Annual Report of the United States Geological Survey, 1884-85, J. W. Powell, 
Director. 1885. 8°. xxix, 570 pp., 65 pis. (Out of stock.) 
Report of the Director, pp. xv-xxix, pis. i-iii. 
Administrative reports of chiefs of divisions, pp. 1-101, pis. iv-x. 
Mount Taylor and the Zuni Plateau, by C. E. Dutton, pp. 105-198, pis. xi-xxii. 
Preliminary paper on driftless area of upper Mississippi Valley, by T. C. Chamberlin and R. D. 
Salisbury, pp. 199-322, pis. xxiii-xxix. 
Quantitative determination of silver by means of the microscope, by J. S. Curtis, pp. 323-352, 
pi. xxx. 
Preliminary report on seacoast swamps of eastern United States, by N. S. Shaler, pp. 353-398. 
Synopsis of flora of Laramie group, by L. F. Ward, pp. 399-557, pis. xxxi-lxv. 
Index, pp. 559-570. 
Seventh Annual Report of the United States Geological Survey, 1885-86, J. W. Powell, 
Director. 1888. 8°. xx, 656 pp., 71 pis. (Out of stock. ) 
Report of the Director, pp. 3-42. 
Administrative reports of chiefs of divisions, pp. 43-143, pis. i-vii. 
Rock-scorings of the great ice invasions, by T. C. Chamberlin, pp. 147-248, pi. viii. 
Obsidian Cliff, Yellowstone National Park, by J. P. Iddings, pp. 249-295, pis. ix-xviii. 
Report on geology of Marthas Vineyard, by N. S. Shaler, pp. 297-363, pis. xix-xxix. 
On classification of early Cambrian and pre-Cambrian formations, by R. D. Irving, pp. 365-454, 
pis. xxx-li. 
Structure of Triassic formation of Connecticut Valley, by W. M. Davis, pp. 455-490, pi. lii. 
Salt-making processes in the United States, by T. M. Chatard, pp. 491-535, pis. liii-lv. 
Geology of head of Chesapeake Bay, by W J McGee, pp. 537-646, pis. lvi-lxxi. 
Index, pp. 647-656. 
Eighth Annual Report of the United States Geological Survey, 1886-87, J. W. Powell, 
Director. 1889. 8°. 2 pt, xix, 474, xii pp. , 53 pis. ; ii, 475-1063 pp. , 23 pis. ( Out 
of stock. ) 
Pt. I. Report of the Director, pp. 1-93, pi. i. 
Administrative reports of chiefs of divisions, pp. 95-257, pis. ii-xv. 
Quaternary history of Mono Valley, California, by I. C. Russell, pp. 261-394, pis. xvi-xliv. 
Geology of Lassen Peak district, by J. S. Diller, pp. 395-432, pis. xlv-li. 
Fossil butterflies of Florissant, by S. H. Scudder, pp. 433-474, pis. lii, liii. 
Index, pp. i-xii. 
Pt. II. The Trenton limestone as a source of petroleum and inflammable gas in Ohio and Indi- 
ana, by Edward Orton pp. 475-662, pis. liv-lx. 
Geographical distribution of fossil plants, by L. F. Ward, pp. 663-960, pi. lxl. 
Summary of geology of quicksilver deposits of Pacific slope, by G. F. Becker, pp. 961-985, 
pis. lxii-lxiii. 
Geology of the island of Mount Desert, Maine, by N. S. Shaler, pp. 987-1061, pis. lxiv- 
lxxvi. 
Index, p. 1063. 
ftnth Annual Report of the United States Geological Survey, 1 887-88, J. W. Powell, 
Director. 1889. 8°. xiii, 717 pp., 88 pis. (Out of stock. ) 
Report of the Director, pp. 1-46. 
Administrative reports of chiefs of divisions, pp. 47-199, pis. i-vi. 
The Charleston earthquake of August 31, 1886, by C. E. Dutton, pp. 203-52S, pis. vii-xxxi. 
Geology of Cape Ann, Massachusetts, by N. S. Shaler, pp. 529-611, pis. xxxii-lxxvii. 
Formation of travertine and siliceous sinter by the vegetation of thermal springs, by W. H.Weed, 
pp. 613-676, pis. lxxviii-lxxxvii. 
On geology and physiography of a portion of northwestern Colorado and adjacents parts of Utah 
and Wyoming, by C. A. White, pp. 677-712, pi. Ixxxviii. 
Index, pp. 713-717. 
