---- THOMAS A. Report from the committee on military affairs favoring bill for the relief of T. A. McLaughlin. (Correction of record.) January 21, 1892. 2pp. Sen. rep. no. 60; 52d Cong., 1st sess. McMAHON, JOHN. Report from the committee on military affairs favoring bill for the honorable discharge of Major John McMahon. February 16, 1892. 2pp. H.R. rep. no. 328; 52d Cong., 1st sess. MAGRUDER, NATHANIEL. Report from the committee on the District of Columbia favoring bill for the relief of the heirs of N. Magruder. (Damages to property.) February 1, 1892. 1p. Sen. rep. no. 138; 52d Cong., 1st sess. MALLY, F. W. Report of progress in the investigation of the cotton boll worm. 12pp. Agr'l Dep't, Div. of Entomology: Bulletin no. 26, pp. 45-56. MARBLE, ALBERT P. Sanitary conditions for schoolhouses. Washington, 1891. 121pp., 81 pls. .75 Interior Dep't, Bureau of Education: Circular of information no. 3, 1891. ---- Industrial education as a part of the common-school course. 5pp. Clarke, I. E., Art and industry, pt. 2, pp. 917-921. MARINE BOARD. Report from the committee on commerce favoring bill to establish a marine board for the advancement of the interests of the merchant marine. January 21, 1892. 4pp. Sen. rep. no. 88; 52d Cong., 1st sess. MARINETTE and WESTERN RAILROAD. Report from the committee on Indian affairs favoring bill to authorize the M. and W. railroad company to construct a railroad through the Menomonee reservation, Wis. February 15, 1892. 1p. H.R. rep. no. 347; 52d Cong., 1st sess. MARITIME CANAL COMPANY OF NICARAGUA. Report. Dec. 10, 1891. 6pp. Sen. ex. doc. no. 4; 52d Cong., 1st sess. MARSH, C. C. Report upon some of the magnetic observatories of Europe. 4^o. 37pp., 6 pls. U.S. Naval Observatory: Observations, 1887; appendix 1. MARSTON, S. W. Report from the committee on Indian affairs favoring bill to settle the claims of S. W. Marston. (Services and expenses as Indian agent.) January 19, 1892. 2pp. Sen. rep. no. 47; 52d Cong., 1st sess. MARTINSBURG, W. VA. Report from the committee on claims favoring bill for the relief of the Methodist Episcopal Church of Martinsburg. (For use and occupancy.) January 25, 1892. 2pp. Sen. rep. no. 97; 52d Cong., 1st sess. MARVIN, C. F., _U.S. A._ Experimental studies on vapor pressure measurements. 33pp. War Dep't, Signal office, annual report 1891, appendix no. 10, pp. 345-377. ---- On the construction of a normal barometer. 4pp., 3 pls. War Dep't, Signal office, annual report 1891, appendix no. 10, pp. 377-380. ---- Experimental studies on vapor pressure measurements. 8pp. War Dep't, Signal office, annual report 1890, appendix no. 18, pp. 655-662. ---- Experimental studies on wind pressures and wind velocities. 8pp. War Dep't, Signal office, annual report 1890, appendix no. 26, pp. 691-698.