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Pennsylvania.—The Topographic and Geologic Survey Commission of Pennsylvania allotted $4,000 for the continuation of the cooperative topographic survey of the State, and the United States Geological Survey allotted an equal amount. The survey of the Windber and Windgap quadrangles, in Bedford, Cambria, Carbon, Monroe, Northampton, and Somerset counties, was completed by Robert Muldrow, Oscar Jones, R. A. Kiger, J. B. Metcalfe, jr., E. D. Monroe, and C. E. Mills, the area mapped being 262 square miles, for publication on the scale of 1: 62,500, with a contour interval of 20 feet. For the control of the Windgap quadrangle and of the Stahlstown quadrangle, in Fayette, Somerset, and Westmoreland counties, C. E. Mills ran 114 miles of primary levels and established 44 permanent bench marks.

In addition to the cooperative work the revision of part of the map of the Houtzdale quadrangle, in Clearfield and Center counties, was commenced by J. I. Gayetty, the area covered being 13 square miles.

Tennessee-Arkansas.—For the control of the Memphis quadrangle, in Shelby County, Tenn., and Crittenden County, Ark., F. W. Crisp and Kostka Mudd ran 98 miles of primary traverse and set 8 permanent marks, of which 42 miles and 3 marks were in Arkansas.

Vermont. For the continuation of cooperative topographic surveys in the State of Vermont the governor allotted $2,000 and the United States Geological Survey allotted an equal amount. The survey of the St. Albans quadrangle, in Franklin and Grand Isle counties, was completed by Duncan Hannegan and J. F. McBeth, the area mapped being 224 square miles, for publication on the scale of 1:62,500, with a contour interval of 20 feet. In connection with this work K. E. Schlachter ran 67 miles of primary levels and established 17 permanent bench marks. The cooperative funds being insufficient to cover the completion of the St. Albans sheet, the additional expenses were borne by the Federal Survey.

Virginia.-For the continuation of cooperative topographic surveys in Virginia the State geologist allotted $4,500 and the United States Geological Survey allotted an equal amount. The resurvey of the Bucu quadrangle and of the Virginia portions of the Hurley and Iaeger quadrangles, in Buchanan, Dickinson, and Russell counties, was completed, and that of the Richlands quadrangle, in Buchanan, Russell, and Tazewell counties, was begun by J. I. Gayetty, C. W. Arnold, F. W. Farnsworth, and Kostka Mudd, the area mapped being 316 square miles, for publication on the scale of 1 : 62,500, with a contour interval of 50 feet. For the control of these areas Mr. Mudd ran 101 miles of primary levels and established 27 permanent bench marks. (See also West Virginia, below.)

West Virginia.-In the continuation of cooperative topographic surveys in West Virginia the State geologist expended $6,758.20 and the United States Geological Survey $1,507.49. A resurvey of the West Virginia portions of the Martinsburg, Berryville, and Gerrardstown quadrangles and of the Morgan County portion of the Capon Bridge quadrangle was completed by E. I. Ireland, Hersey Munroe, T. F. Slaughter, K. W. Trimble, and C. W. Arnold, the area mapped being 467 square miles, for publication of the scale of 1 : 62,500, with a contour interval of 20 feet. Of this area 1 square mile is in Virginia. This work completed the mapping of Berkeley, Jefferson, and Morgan counties on the scale of 1 : 62,500. In connection with this work G. T. Hawkins and J. B. Metcalfe, jr., ran 99 miles of primary traverse and set 10 permanent marks, and K. W. Trimble and H. S. Senseney ran 115 miles of primary levels and established 34 permanent bench marks.

For the control of portions of the Webster Springs, Cowen, Richwood, Winona, and Summersville quadrangles Oscar Jones occupied 15 triangulation stations. This work was done to control those portions of Nicholas and Webster counties not yet mapped on the scale of 1 : 62,500.

OFFICE WORK.

The drafting of the following sheets was completed: Muscle Shoals and Center Star, Ala.; Talking Rock, Ga.; Casco Bay, Liberty, and Portland, Maine; Canaseraga, N. Y.; Belhaven, Gastonia, and Kinston, N. C.; Windber and Windgap, Pa.; Murfreesboro, Tenn.; St. Albans, Vt.; Bucu, Va.; Iaeger, Va.-W. Va.; Winona, W. Va.

Progress in the drafting of additional sheets was made as follows: Hornell, N. Y., 20 per cent; Malone, N. Y., 50 per cent; Hurley, Va.-Ky., 67 per cent; Berryville, W. Va.-Va., 26 per cent; Capon Bridge, W. Va.-Va., 15 per cent; Gerrardstown, W. Va.-Va., 72 per cent; Martinsburg, W. Va.-Va.-Md., 91 per cent.

The following computations and adjustments were made:

Primary-level circuits were adjusted for the Center Star (Ala.), Talking Rock (Ga.), Blanchard (La.), Belfast, Liberty, and Portland (Me.), Vicksburg (Miss.), Canaseraga, Edwards, Hornell, and Oswegatchie (N. Y.), Belhaven, Bunyon, and Chocowinity (N. C.), Stahlstown, and Windgap (Pa.), Murfreesboro (Tenn.), Franklin Pond and St. Albans (Vt.), Bucu, Hurley, Iaeger, and Richlands (Va.) quadrangles.

Geographic positions were computed for the Weogufka (Ala.), Blanchard and Bossier (La.), Washington (D. C.-Md.), Natchez and Vicksburg (Miss.), Berne, Edwards, Malone, Moira, Oneonta, Oswegatchie, Sidney, and Stark (N. Y.), Belhaven, Bunyon, and Plymouth (N. C.), Berryville, Gerrardstown, and Martinsburg (W. Va.) quadrangles.

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CENTRAL DIVISION.

FIELD WORK.

Summary. During the season topographic mapping was carried on in Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Missouri, Ohio, and Wisconsin. The work comprised the completion of the survey of 25 quadrangles and of the resurvey of 7 quadrangles, in addition to which 19 quadrangles were partly surveyed and 3 were partly resurveyed. The total new area mapped was 5,208 square miles, for publication on the scale of 1 : 62,500; and the area resurveyed was 935 square miles, for publication on the scale of 1: 62,500. In connection with this work 1,971 miles of primary levels were run and 454 permanent bench marks were established.

Primary traverse was carried on at different times by six parties, the work being distributed over portions of Illinois, Iowa, Kentucky, Michigan, Minnesota, and Wisconsin. The total area covered by the primary control was about 4,000 square miles, of which 3,600 square miles was controlled by primary traverse, 958 linear miles of primary traverse being run and 84 permanent marks set. Five triangulation stations were occupied and 4 marked. The result of this work was to make control available in 50 quadrangles.

Topographic surveys in central division from July 1, 1914, to June 30, 1915.

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Minois.—The governor of Illinois allotted $9,000 for the continuation of cooperative topographic surveys in Illinois and the United States Geological Survey allotted an equal amount. The

The survey of the Coulterville and Equality quadrangles and of the Illinois portions of the Shawneetown, Birds, Fords Ferry, and Golconda quadrangles in Perry, Randolph, St. Clair, Washington, Gallatin, Hardin, Pope, Saline, Crawford, and Lawrence counties was completed, and that of the Brownfield quadrangle, in Johnson, Massac, and Pope counties,

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