TWENTY-SEVENTH ANNUAL MEETING. 297 



Compte Rendu de la Cinquieme Session, Washington, 1S!)1, 530 pp.; 21 pll.; 39 

 figs. Troisieme Partie: A. La correlation par plantes fossiles, par L. P. 

 Ward; pp. 97-109. B. The Pre-Cambrlan rocks of North America, by C. R. 

 Van Hise; pp. 110-150. Quatrieme Partie: A. Geology of Washington and 

 vicinity, by W. J. McGee; pp. 219-251. B. Geological Guide Book of the 

 Rocky Mountain excursion, edited by SamueU Franklin Emmons; pp. 253-487; 

 pll. i-xiii; figs. 1-32; map. C. Excursion to Lake Superior: Pre-Cambrian 

 geology of the Lake Superior region, by C. R. Van Hise; pp. 489-512; pll. xiv-xxl; 

 figs. 33-39. 

 Smithsonian Institution, S. P. Langley, Secretary: 



Annual Report of the Board of Regents, for the year ending June 30, 1891, 

 750 pp.; 15 fig., bound in black cloth. Celestial Spectroscopy, by Wm. 

 Huggins, pp. 69-102. Stellar Numbers and Distances, the Sun's Motion in 

 Space, and the Southern Observatory, by . Agnes M. Gierke, pp. 103-126. Ap- 

 plications of Physics and Mathematics to Geology, by C. Chree, pp. 127-153. 

 Origin of Rock Pressure of natural gas in Ohio and Indiana, by Edwin Orton, 

 pp. 155-162. Geysers, by Walter H. Weed, pp. 163-178. The Gulf Stream, by 

 Alexander Agassiz, pp. 189-206; 6 figs. On the Absolute Measurement of Hard- 

 ness, by F. Auerbach, translated by Carl Barus, pp. 207-236. The Flow of 

 Solids, by Wm. Hallock, pp. 237-246; 4 figs. Divergent evolution through cumu- 

 lative segregation, by Rev. J. T. Gulick, pp. 269-336. The Struggle for Life m 

 tlie Forest, by James Rodway, pp. 337-347. Geographic distribution of life in 

 North America, by C. Hart Merriam, M. D., pp. 365-415. The Corbin Game 

 Park, by John R. Spears, pp. 417-423; 1 fig. Summary of progress in anthro- 

 pology in 1891, by Otis T. Mason, pp. 433-502. The Mounds of the Mississippi 

 Valley, historically considered, by Lucien Carr, pp. 503-599. Some of the pos- 

 sibilities of Economic Botany, by G. L. Goodale, pp. 617-646. On the Rela- 

 tion of Natural Science to Art, by Dr. E. du Bois-Rej'mond, F.R.S., pp. 661- 

 682. 



Annual Report for the year ending June 30, 1S92, 860 pp.; 178 figs. The 

 History of the Telescope, by Prof. C. S. Hastings, pp. 95-109. Geological 

 Chan.ge, and Time, by Sir Archibald Geikie, pp. 111-131. Geological History 

 of the Yellowstone National Park, and Soaping Geysers, by Arnold Hague, 

 pp. 133-161; map. Continental Problems of Geology, by G. K. Gilbert, pp. 

 163-17:-;; 5 figs. Pre-Columbian Copper Mining, by R. L. Packard, pp. 175-198. 

 Discharge of Electricity through exhaustive tubes without electrodes, by J. J. 

 Thomson, F.R.S., pp. 229-254; 15 figs. The Molecular Process in Magnetic In- 

 duction, by Prof. J. A. Ewing, F.R.S., pp. 255-268; 15 figs. Crystallization, by 

 G. D. Liveing, F.R.S., pp. 269-280; 7 figs. The Rejuvenescence of Crystals, by 

 Prof. John W. Judd, F.R.S.,; pp. 281-288. Deduction from the Gaseous Theory 

 of Solution, by Prof. Orme Masson; pp. 287-298; 3 figs. Liquids and Gases, by 

 Prof. Wm. Ramsey, F.R.S. ; pp. 303-312; 2 figs. Present Problems in Evolu- 

 tion and Heredity, by Henry Fairfield Osborn; pp. 313-374; 12 figs. Report on 

 the Migration of Birds, by Prof. J. A. Palmen; pp. 375-386; 1 pi. The Empire 

 cf the Air: an ornithological essay on the flight of birds, by L. P. Mouillard; 

 pp. 397-463; 14 figs. Progress of Anthropology in 1892, by Prof. Otis T. Mason; 

 pp. 465-512. The Advent of Man in America, by Armand de Quatrefages; pp. 

 513-520. Prehistoric New Mexican Pottery, by Henry Hales; pp. 535-554; 17 

 figs. Relics of an Indian Hunting Ground in York county, Pa., by Atreus 

 Wanner; pp. 555-570; 68 figs. Aboriginal Burial Mounds in Seneca county, 

 Ohio, by Russell J. Thompson; pp. 571-575; 4 figs. Indian Remains on the Upper 

 Yellowstone, by Col. Wm. S. Brackett; pp. 577-581; 3 figs. The Inventors of 

 the Telegraph and Telephone, by Prof. Thomas Gray, F. R. S. E., pp. 639-657. 

 Explorations in Mongolia and Tibet, by W. Woodville Rockhill; pp. 659-679; 12 

 ligs. Progress of Astronomy for 1891, 1892, by Wm. C. Winlock, pp. 681-774. 



Annual Report for the year ending June 30, ]<893, 808 pp.; 94 pll. The 

 Wanderings of the North Pole, by Sir Robert Ball, F. R. S. ; pp. 75-87. The 

 Great Lunar Crater Tycho, by A. C. Ranyard; pp. 89-94. The Early Temple 

 and Pyramid Builders, by J. Norman Lockyer; pp. 95-105. Variable Stars, by 

 Prof. C. A. Young; pp. 107-111. The Luminiferous Ether, by Sir G. Stokes; pp. 

 113-119. Atoms and Sunbeams, by Sir Robert Ball, F. R. S. ; pp. 121-133. Funda- 

 mental Units of Measure, by T. C. Mendenhall; pp. 135-149. Photography in 

 the Colors of Nature, by F. E. Ives; pp. 151-162. Electric Spark Photographs 

 cf Flying Bullets, by C. V. Boys, F. R. S.; pp. 165-182; pll. II-XII. Magnetic 

 Properties of Liquid Oxygen, by Prof. James Dewar; pp. 183-187; 1 fig. The 



