Rolling versus Hammering Ingots. A paper read before the American Institute of Mining Engineers, February 21st, 1872. Published in the Transactions, Vol I., p. 203. Octavo, 3 pp.

Three-high Rolls. A paper read before the American Institute of Mining Engineers, October 17th, 1872. Published in the Transactions, Vol. I., p. 287. Octavo, 6 pp., with plate.

Tests of Steel. A paper read before the American Institute of Mining Engineers, October 22d, 1872. Published in the Transac tions, Vol. II., p. 116. Octavo, 6 pp.

Bessemer Machinery. A lecture delivered before the students of the Stevens Institute of Technology, Hoboken, N. J., in 1873. Published in the Journal of the Franklin Institute, Vol. LXIV. Octavo, 30 pp., with plates.

Recent Improvements in Bessemer Machinery. A paper read before the American Institute of Mining Engineers, February 24th, 1874. Published in the Transactions, Vol. II., p. 263. Octavo, 10 pp., with plates.

On American Rolling Mills. A paper read before the Iron and Steel Institute of Great Britain. Published in the Journal of the Institute, No. II. for 1874. Octavo, 19 pp., with plates.

Setting Bessemer Converter-Bottoms.

Iron and Steel Institute of Great Britain.

A paper read before the
Published in the Journal

of the Institute, No. II. for 1874. Octavo 6 pp., with plates.

The Porter-Allen Engine: Report on its Practical Performance, Economy, Durability, etc., with a View to Establishing its Manufacture. By A. L. Holley, C. E. New York: D. Van Nostrand, 1875. Octavo pamphlet, 11 pp.

On the Use of Natural Gas for Puddling and Heating, at Leechburg, Pennsylvania. A paper read before the American Institute of Mining Engineers, May 27th, 1875. Published in the Transactions, Vol. IV., p. 32. Octavo, 3 pp.

The Form, Weight, Manufacture and Life of Rails. Remarks before the American Society of Civil Engineers, June, 1875. Published in the Transactions, Vol. IV., p. 233. Octavo, 3 pp.

Tests and Testing-Machines. Remarks before the American Society of Civil Engineers, June, 1875. Published in the Transactions, Vol. IV., p. 265. Octavo, 44 pp.

Some Pressing Needs of our Iron and Steel Manufactures. Presidential Address before the American Institute of Mining Engineers, October 26th, 1875. Published in the Transactions, Vol. IV., p. 77. Octavo, 23 pp.

What is Steel? A paper read before the American Institute of Mining Engineers, October 29th, 1875. Published in the Transactions, Vol. IV., p. 138. Octavo, 12 pp.

The Inadequate Union of Engineering Science and Art. Presidential Address before the American Institute of Mining Engineers, February 22d, 1876. Published in the Transactions, Vol. IV., p. 191. Octavo, 17 pp.

Iron and Steel at Philadelphia. A series of articles by A. L. Holley and Lenox Smith, published in London Engineering as follows:

I. Iron and Steel at Philadelphia, November 10th, 1876.
II. Swedish Exhibits, December 6th, 1876.

III. Belgian and French Exhibits, January 5th, 1877.
IV. German Exhibits, January 19th, 1877.

V. The Exhibits of Great Britain, February 9th, 1877.

VI. American Exhibits, March 2d, 1877.

American Iron and Steel Works. A series of illustrated articles, by A. L. Holley and Lenox Smith, published in London Engineering, as follows:

I. An Analysis of the American Bessemer Plant, Illustrated by the Vulcan Works, St. Louis, March 9th, 1877.

II. An Analysis of the American Bessemer Plant, Illustrated by the Vulcan Works, St. Louis, March 16th, 1877.

III. The Midvale Steel Works, Philadelphia, March 30th, 1877. IV. The Works of Park, Brothers & Co., May 4th, 1877. V. The Union Iron Works, Buffalo, N. Y., June 22d, 1877. VI. The Otis Iron and Steel Works, Cleveland, O., July 27th, 1877.

VII. The Works of the Bethlehem Iron Co., Bethlehem, Pa., August 24th, 1877.

VIII. The Works of the Bethlehem Iron Co., Bethlehem, Pa., August 31st, 1877.

IX. The Works of the Bethlehem Iron Co., Bethlehem, Pa., September 14th, 1877.

X. The Works of the Bethlehem Iron Co., Bethlehem, Pa., October 19th, 1877.

XI. The Works of the Bethlehem Iron Co., Bethlehem, Pa., October 26th, 1877.

XII. The Crescent Steel Works, Pittsburg, Pa., November 23d, 1877.

XIII. The Cedar Point Iron Company's Works, December 21st, 1877.

XIV. The North Chicago Rolling Mill Company's Works, January, 18th, 1877.

XV. The North Chicago Rolling Mill Company's Works, February, 8th, 1878.

XVI. Rail Mill of the Philadelphia and Reading Railroad, Reading, Pa., February 22d, 1878.

XVII. Mines and Works of the Crown Point Iron Company, N. Y., March 15th, 1878.

XVIII. Mines and Works of the Crown Point Iron Company, N. Y., March 22d, 1878.

XIX. The Diamond Furnace-Ferro-manganese Manufacture in the United States, March 29th, 1878.

XX. Works of the Cleveland Rolling Mill Company, O., April 5th, 1878.

XXI. Works of the Edgar Thomson Steel Company, Limited, Pittsburg, Pa., April 9th, 1878.

XXII. Works of the Edgar Thomson Steel Company, Limited, Pittsburg, Pa., April 26th, 1878.

XXIII. Works of the Edgar Thomson Steel Company, Limited, Pittsburg, Pa., May 17th, 1878.

XXIV. Plate Mill of the Bay State Iron Company, Boston, Mass., May 24th, 1878.

XXV. The Cambria Iron and Steel Works, Johnstown, Pa., May 31st, 1878.

XXVI. The Cambria Iron and Steel Works, Johnstown, Pa., June 21st, 1878.

XXVII. The Cambria Iron and Steel Works, Johnstown, Pa., July 12th, 1878.

XXVIII. The Cambria Iron and Steel Works, Johnstown, Pa., July 19th, 1878.

XXIX. The Cambria Iron and Steel Works, Johnstown, Pa., August 23d, 1878.

XXX. The Cambria Iron and Steel Works, Johnstown, Pa., September 30th, 1878.

XXXI. The American Iron Works of Jones & Laughlin, Pittsburg, Pa., November 1st, 1878.

XXXII. The Lucy Furnaces, Pittsburg, Pa., November 22d,

1878.

XXXIII. The Union Iron Mills, Pittsburg, Pa., January 10th,

1879.

XXXIV. The Works of Cooper, Hewitt & Company, Trenton, N. J., and Riegelsville, Pa., January 31st, 1879.

XXXV. The Works of Cooper, Hewitt & Co., Trenton, N. J., and Riegelsville, Pa., February 21st, 1879.

XXXVI. The Works of the Meier Iron Company, April 18th,

1879.

XXXVII. Salisbury Iron; and the Works of the Barnum Richardson Company, May 30th, 1879.

XXXVIII. The Works of the Phoenix Iron Company, Phoenixville, Pa., February 6th, 1880.

XXXIX. The Springfield Iron Works, Springfield, Ill., May 14th, 1880.

XL. The Albany and Rensselaer Iron and Steel Works, Troy, N. Y., December 24th, 1880.

XLI. The Albany and Rensselaer Iron and Steel Works, Troy, N. Y., December 31st, 1880.

Notes on the Salisbury, Conn., Iron Mines and Works. A paper read before the American Institute of Mining Engineers, October 23d, 1877. Published in the Transactions, Vol. VI., p. 220. Octavo, 4 pp.

Notes on the Iron Ore and Anthracite Coal of Rhode Island and Massachusetts. A paper read before the American Institute of Mining Engineers, October 24th, 1877. Published in the Transactions, Vol. VI., p. 224. Octavo, 3 pp.

The Strength of Wrought Iron, as Affected by its Composition, and by its Reduction in Rolling. A paper read before the American

Institute of Mining Engineers, February 27th, 1878. Published in the Transactions, Vol. VI., p. 101. Octavo, 24 pp.

Solid Steel Castings for Ordnance, Structures and General Machinery by the Terrenoire Process. Published in the Metallurgical Review, New York, May, June and July, 1878. Octavo, 48 pp.

Chemical and Physical Analyses of Phosphoric Steel. A paper read before the Institution of Civil Engineers (England). Published in the Proceedings, Vol. VIII., Session 1877-78. Part III. London 1878. Octavo, 28 pp.

The United States Testing Machine at Watertown Arsenal. A paper read before the American Institute of Mining Engineers, February 18th, 1879. Published in the Transactions, Vol. VII., p. 256. Octavo, 9 pp.

The Pernot Furnace. A paper read before the American Institute of Mining Engineers, February 19th, 1879. Published in the Transactions, Vol. VII., p. 241. Octavo, 14 pp., with plates.

The Tessie Gas Producer. A paper read before the American Institute of Mining Engineers, May 13th, 1879. Published in the Transactions, Vol. VIII., p. 27. Octavo, 7 pp., with plates.

Washing Phosphoric Pig-Iron for the Open-hearth and Puddling Processes. A paper read before the American Institute of Mining Engineers, September 17th, 1879. Octavo, 9 pp., with plates.

The Field of Mechanical Engineering. An address delivered at the preliminary meeting of the American Society of Mechanical Engineers, February 16th, 1880. Published in the Transactions, Vol. I., p. 7 (in the earliest copies it is at p. 28). Octavo, 5 pp.

Notes on the Siemens Direct Process. A paper read before the American Institute of Mining Engineers, February 19th, 1880. Published in the Transactions, Vol. VIII., p. 321. Octavo, 4 pp., with plates.

Engineering, the Intermediate Power between Nature and Civilization. An address delivered at the banquet in honor of Count Ferdinand