---- Physical hydrography. Tides at Sandy Hook, observed and predicted times and heights during 1889. By J. F. Hayford. Appendix no. 15, Report for 1890. Washington, 1891. 4^o. 12pp., 2 charts. .15 ---- Weights and measures. The relation of the yard to the metre. By O. H. Tittmann. Appendix no. 16, Report for 1890. Washington, 1891. 4^o. 8pp. .15 ---- Geodesy. International geodetic association. Ninth conference. Address of George Davidson. Appendix no. 17, Report for 1890. Washington, 1891. 4^o. 15pp. .15 ---- Weights and measures. The national prototypes of the standard metre and kilogramme. U.S. customary and metric standards. Transportation of the national prototypes from Paris to Washington, their official opening and certification and the deposit in the office of weights and measures. By O. H. Tittmann. Appendix no. 18, Report for 1890. Washington, 1891. 4^o. 25pp., 1 pl. .20 ---- Geographical explorations. Early expeditions to the region of Bering sea and strait. From reports and journals of V. I. Bering. Translated by W. H. Dall. Appendix no. 19, Report for 1890. Washington, 1891. 4^o. 18pp., 2 maps. .75 ---- Geographical explorations. Notes on an early chart of Long Island Sound and its approaches. By C. H. Townshend. Appendix no. 20, Report for 1890. Washington, 1891. 4^o. 6pp., map. .20 UNITED STATES CONSULAR REPORTS. Reports from the consuls of the United States. Vol. xxxvi, nos. 128-131, May-August, 1891. Washington, 1891. 664pp. 1.60 H.R. mis. doc. no. 18; 52d Cong., 1st sess. ---- _Same._ Vol. xxxvii, nos. 132-135, September-December, 1891. Washington, 1892. 589+xiiipp., 3 pls. 1.60 H.R. mis. doc. no. 154; 52d Cong., 1st sess. ---- _Same._ Vol. xxxviii, nos. 136-139. January-April, 1892. Washington, 1892. xvi, 1-810pp. 1.60 _Note:_ No. 139 contains "Local transportation" and "Underground conduits." ---- _Same._ May, 1892, no. 140. Washington, 1892. 192pp. .40 ---- Special consular reports. Vol. iii. Streets and highways in foreign countries. Washington, 1891. 592pp. 1.25 H.R. mis. doc. no. 20; 52d Cong., 1st sess. ---- _Same._ Vol. iv. Port regulations in foreign countries, 1891. Washington, 1891. 732pp. 1.25