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York. C. Tomkins. (27), Feb. 18, 1911. I.-Notes on the Bar Harbors at the entrances to Coos Bay, and Umqua and Siuslaw rivers, Oregon. L. M. Haupt. (21), Jan., 1911.-Operation of rock breakers at Black Rock Harbor, Buffalo, N. Y. (15), Jan. 7. 1911. D. I.-Port of London improvements. (15), Feb. 25, 1911.-The Port of New York. (15), March 11, 1911.-Le projet de Paris-port-de-mer. (48), Feb., 1911. D.-Proposed improvements of the Port of London. (10), Feb. 3, 10, 1911. D.; (11), Feb. 3, 1911. D. River and harbor improvements and the Corps of Engineers. Extracts from an address by Gen. W. H. Bixby. (15), Dec. 24, 1910.Terminal facilities in their relation to waterway improvement. G. A. Zinn. (30), April, 1911.-25-ton steam travelling crane for harbor works, Singapore. (11), Jan. 13, 1911. I.

HYDRAULICS.

The flow of water over dams. G. S. Williams. (14), Jan. 12, 1911. D.-Flow of water through submerged screens. (15), Dec. 31, 1911.-Surges in pipe lines. F. G. Baum. (15), Dec. 24, 1910. D.

HYDROGRAPHY.

Hydrography as an aid to the successful operation of an irrigation system. Discussion. E. F. Chandler and others. (21), Dec., 1910.

INLAND NAVIGATION.

Economie value of waterway transportation with reference to the proposed Deep waterway from Chicago to the Gulf. (12), Jan. 11, 1911.—The passing of the waterway boom. (14), March 2, 1911.-Report of a Board of Engineers on the Illinois section of the Lakes-to-the-Gulf waterway. (14), March 2, 1911.-Terminal facilities in their relation to waterway improvement. G. A. Zinn. (30), April, 1911.-The waterway from Chicago to the Mississippi. (15), Feb. 25, 1911.-Waterways-their limitations and possibilities. F. A. Delano. (12), Jan. 11, 1911.

1911.

INSTRUMENTS.

General description of the depression position plotter. D. E. Hughes. (30), April, D. I.

LANDSLIDES.

Report by a geologist on slides in Culebra Cut and by a Board of Engineers on the revetment of the sides of the cut. (14), Jan. 5, 1911.

LIGHT-HOUSES, ETC.

A new automatic flashing light.

(10), Dec. 23, 1910. I.

LOCKS AND LOCK GATES.

Concrete plant on Panama locks. Description of machinery and method of operation in construction of walls of the three Pacific locks. (39), Feb. 15, 1911. D.Emergency gates on the Illinois and Mississippi Canal. (14), Dec. 15, 1910. D.Excavating the pit for a third lock at Sault. Ste. Marie. (15), Jan. 7, 1911. I.— Handling concrete on canal locks. (40), March, 1911. D.-Methods and costs of constructing concrete masonry for the Pedro Miguel and the Miraflores locks of Panama Canal. (12), Dec. 14, 1910. D. Methods of constructing the Black Rock Harbor Lock, New York Barge Canal. (12), Jan. 4, 1911. D. I.-New Canal Gate at Sault Ste. Marie. (15), Dec. 10, 1910. D. I.-New Lock and Dam No. 5, Monongahela River. L. M. Adams. (30), April, 1910. D. I.-Renewing lock gates on Kanawha River. T. E. Jeffries. (15), Dec. 24, 1910. I-Valve-operating mechanism for the Panama Canal locks. (15), Jan. 7, 1911.

MILITARY BRIDGES.

Bridging operations at Harty Ferry.

J. C. Matheson.

(32), Feb., 1911. I.

MILITARY ENGINEERING.

Military Engineering. C. W. Otwell. (22), Jan.. 1911. I-Work of the Corps of Engineers, Ohio National Guard. From report of J. R. McQuigg. (30), April, 1911. I-Work of the Royal Engineers in the China or Boxer war of 1900-1901. T. N. S. Bowring. (32), March, 1911.

F.

MILITARY MINING.

Observation land mines. L. Debogorii-Makrievich. (32), Feb., 1911. D.

MOTOR CARS AND MOTOR TRUCKS.

Automobiles for transporting airship guns. (27), Jan. 21, 1911. I.-Automobiles lourds a bascule. Binard automobile. (37), Oct., 1910. I. Auto-trucks for the Army. J. C. McArthur. (51), March-April, 1911. I.-Colonial and military motor transport. (11), Jan. 27, 1911.-Motor car ignition systems. G. L. Hall. (32), March, 1911. D.-Motor truck for hauling building stones. (28), Feb. 25, 1911. I.Recent motor trucks; their adaptability to contractors' haulage. (12), Feb. 22, 1911. D. I.

PANAMA CANAL.

Concrete barges for the Panama Canal. M. E. Rupp. (40), Feb., 1911. I.— Concrete plant on Panama locks. (39), Feb. 15, 1911. D. Construction plant for Gatun Lock and Gatun Dam. E. Schilhauer and E. E. Lee. (14), Feb. 16, 1911. D. I.-Cost of quarrying and crushing stone and of dredging sand for concrete' construction on the Panama Canal. (12), Dec. 14, 1910. D.-Descriptions of the Panama Canal work in recent volumes of Engineering News. (14), Jan. 26, 1911.— Efficient administration of public works. (15), Jan. 7, 1911.-Handling concrete on canal locks. (40), March, 1911. D. Local additions to canal equipment. (39), Jan. 15, 1911.-Method of securing and recording costs in the Panama Canal work. (12), Dec. 21, 1910.-Methods and costs of constructing concrete masonry for the Pedro Miguel and the Miraflores locks of the Panama Canal. (12), Dec. 14, 1910. D.-Proceedings of the 99th meeting, Am. Institute of Mining Engineers, Canal Zone, Nov., 1910. (Bull., A. Min. Engrs.) Dec., 1910. I.-Progress and costs of filling for the Gatun Dam, Panama Canal. (12), Dec. 21, 1910. D.-Report by a geologist on slides in Culebra Cut and by a Board of Engineers on the revetment of the sides of the cut. (14), Jan. 5, 1911.-Should retaining walls be built at the sides of the Culebra Cut? Editorial. (14), Jan. 5, 1911.-The Tehuantepec Railway as a rival of the Panama Canal. Editorial. (14), Jan. 19, 1911.-Valve-operating mechanism for the Panama Canal locks. (15), Jan. 7, 1911.-What the Panama Canal will mean in our relation with Peru. (27), Feb. 4, 1911.-What will be, to the Isthmian Canal Commission, the salvage value of the construction plant at Panama? (12), Dec. 21, 1910.-Work at the Panama Canal. (45), Jan., 1911.-Work on the Panama Canal; retaining walls in the Culebra Cut. E. L. Corthell. (14), Feb. 9, 1911.The Gatun spillway, Panama Canal, with some costs of construction. (12), Dec. 21, 1910. D.

PIERS.

PILE DRIVERS AND PILE DRIVING.

Steel pile driver leads. (15), March 4, 1911. I.

Concrete-steel piers at Baltimore. (39), Dec. 15, 1910.-The "Longer pier" controversy at New York, (27), Feb. 4, 1911. D.-Necessity of longer piers for the Port of New York. C. Tomkins. (27), Feb. 18, 1911. I. Pier encroachment on the Hudson River at New York. (14), March 9, 1911.-The Port of New York. (15), March 11, 1911.-Reconstruction of the Tyne North Pier. (10), Jan. 6, 1911. I.— Reinforced-concrete piers at the U. S. Naval Station, Olongapo, P. I. C. A. Carlson. (14), Dec. 15, 1910. D. I.

I.

PRESERVATION OF TIMBER.

An experiment in wood preservation. M. Meigs. (30), April, 1911.-Asphaltic oils for the preservation of railway ties. F. W. Cherrington. (14), Feb. 2, 1911. 1.Marine wood destroyers in the waters of the South Atlantic ports. W. D. Faucette. (14), Jan. 5, 1911.-Notes on creosoting. C. M. Davis. (30), April, 1911. I.Preservation of structural timbers from decay. C. P. Winslow. (42). Dec., 1910. D. I-Timber preservation, its development and present scope. R. Lamb and J. M. Schreiber. (21), Jan., 1911.-Wood preserving with asphalt oils. (24), Feb. 1, 1911.

PUBLIC WORKS.

Efficient administration of public works. (15), Jan. 7, 1911.-Important projects of river and harbor improvement provided for in the Federal law of 1910. E. N. Johnston. (12), Jan. 18, 25, 1910.-Recommendations for river and harbor improvements. Extract. ... Gen. W. H. Bixby. (15), Dec. 31, 1910.-River and harbor improvements and the Corps of Engineers. Extract fr. address. W. H. Bixby; also, Editorial. (15), Dec. 24, 1910.

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