316 KAXSAS ACADEMY OF f^CIEWE. 



absolute measures of the direction and Intensity of the earth's mag-netic 

 force, by Charles A. Schott, Assistant; pp. 199-241. Part II.— Results of the 

 differential measures of the magnetic declination; pp. 243-457; pU. 21-29. No. 10. 

 The Gulf Stream: Methods of investigation and results of the research, by 

 Lieut. John E. Pillsbury, IT. S. N., Assistant: pp. 461-620; pll. 30-54. No. 18. 

 Historical accounts of the United States weights and measures, by O. H. Titt- 

 mann. Assistant; pp. 73.5-75S, pi. 68. No. 19. Notes on an original Manuscript 

 Chart of Bering's expedition of 1725-1730, by William Healey Dall; pp. 759-774; 

 pll. 69, 70. 



Report for the year ending June 30, 1891. Part II. 15x23 cm., bound in 

 black cloth; 746 pp.; 33 pll.; 3 maps folded in. Appendix No. 1. Approximate 

 times of culminations, and of the azimuths at elongation of Polaris for the 

 years between 1889 and 1910; pp. 7-13. No. 2. On the determination of an 

 azimuth from micrometric observations of a close circumpolar star near 

 elongation by means of a meridian transit, etc.; pp. 15-19. No. 3. The sec- 

 ular variation and annual change of the magnetic force at stations occupied 

 by E .D. Preston, assistant, in connection with the U. S. Eclipse Expedition 

 to the west coast of Africa, 1889-1890, in charge of Prof. D. P. Todd; pp. 21-39. 

 No. 4. Results of observations recorded at the U. S. Coast and Geodetic 

 Survey Magnetic Observatory, Los Angeles, Cal., 1882-1889. Part III.— Re- 

 • suits of the differential measures of the horizontal intensity (10 illustrations); 

 pp. 41-267. No. 10. On the observations of currents with the direction cur- 

 rent meter in the Straits of Florida and the Gulf of Mexico; pp. 343-364; 9 

 illustrations. No. 13. On observations for various latitudes made near Hono- 

 lulu, Oahu, H. I., and on determinations of gravity and the magnetic ele- 

 ments; pp. 479-485. No. 14. Report on an expedition to the Muir Glacier, 

 Alaska, with determinations of latitude an5 the magnetic elements; pp. 487- 

 501; 1 colored map. No. 15. Determinations of gravity with the half-second 

 pendulums of the C. & G. S. on the Pacific coast, in Alaska, Washington, 

 D. C, etc.; pp. 503-564; 1 map; 3 figs. 



For the fiscal year ending June 30, 1892. Same size and style. Part II; 552 

 pp.; 5 half tone pll.; 5 maps; 1 chart; 24 figs, and illustrations. Appendix. 

 No. 1. On the variation of latitude at Rockville, Md., from observations 

 made in 1S91 and 1892; pp. 1-.51; 2 pll.; 2 figs. No. 2. On the variation of lati- 

 tude at Waikiki, near Honolulu, Hawaiian Islands, from observations made in 

 1891 and 1892; pp. 53-159; illustrations 5-17. Nos. 3 and 4. On the results of spirit 

 leveling of precision between Okolona, Miss., and Odin, 111., and other points 

 in the gulf states; pp. 161-224, with map. No. 6. On the changes in the ocean 

 shore lines of Nantucket Island, Massachusetts; pp. 243-258; 8 pll. and illus- 

 trations. Results of observations recorded at the U. S. Coast and Geodetic 

 Survey Magnetic Observatory, Los Angeles, Cal., 1882-1889. Part IV.— Results 

 of the differential measures of the vertical force component, and of the vari- 

 ations of dip and of total force: pp. 253-327. No. 8. On the measurement of the 

 Holton base, Holton, Ind., and the St. Albans base, Kanawha county, W. Va. ; 

 pp. 329-503; 2 pll.; 3 maps. 



ILLINOIS. 

 CHAMPAIGN.— Illinois State Laboratory of Natural History; S. A. Forbes, Di- 

 rector: 



Biennial Report of the Director, 1891-2; 8 pp. 



Bulletins. Index to Vol. 1. 97 pp. 



Vol. III. Article XIV.— Bibliographical and Synonymical Catalogue of the 

 described Membracidae of North America, by F. W. Coding, M. D., .pp. 391-482. 

 Natural History Survey of Illinois, S. A. Forbes, Director: 



The Ornithology of Illinois, 18x26 cm., bound in green cloth. Vol. I, part 1, 

 Descriptive Catalogue, by Robert Ridgway, pp. 7-500; 20 plates of drawings; 

 photographic plates XXI-XXXII. 

 S. A. Forbes, State Entomologist: 



Third Annual Report on the Noxious Insects of Illinois, by William LeBaron, 

 M. D., pp. 167-202 and 1-37; 6 dia. 



Fifteenth Report, Fourth Report of S. A. Forbes, 1SS5-6. 103 pp.; 4 figs. 



Sixteenth Report, Fifth Report of S. A. Forbes, 1SS7-S, pp. 1-101; pll. I-VI; 

 6 diagrams. Appendix. Contribution of an Economic Bibliography of the 

 Chance Bug, 1785-1888. Pp. 5-122. 



Seventeenth Report, Sixth Report of S. A. Forbes, 1S89-90. Pp. ix-xv and 1-87; 



