OF THE FRANKLIN INSTITUTE OF THE State of Pennsylvania — AND MECHANICS' REGISTER. DEVOTED TO MECHANICAL AND PHYSICAL SCIENCE, CIVIL ENGINEERING, THE ARTS AND MANUFACTURES, AND THE RECORDING OF AMERICAN AND OTHER PATENTED INVENTIONS. EDITED BY THOMAS P. JONES, M. D. MEMBER OF THE AMERICAN PHILOSOPHICAL SOCIETY, OF THE ACADEMY OF NAT- AND SCIENCES, MASSACHUSETTS, AND CORRESPONDING MEM- BER OF THE POLYTECHNIC SOCIETY OF PARIS. NEW SERIES. VOL. XXIII. CPHILADELPHIA: PUBLISHED BY THE FRANKLIN INSTITUTE, AT THEIR HALL, F. TAYLOR, WASHINGTON CITY; GY'& C. CARVILL & CO., NEW YORK; AND JOSEPH H. FRANCIS, BOSTON. JOURNAL OF THE FRANKLIN INSTITUTE OF THE State of Pennsylvania, AND MECHANICS' REGISTER. JANUARY, 1839. Practical and Theoretical Mechanics and Chemistry. Experiments on two varieties of Iron, manufactured at the Adirondack works, directly from the Magnetic Ore of McIntyre, Essex county, New York, by WALTER R. JOHNSON, late Professor of Mechanics and Natural Philosophy, in the Franklin Institute, Philadelphia. The portion of the state of New York bounded eastwardly by lakes George and Champlain, northwardly by the Canada line, and northwestwardly by the river St. Lawrence, embracing the counties of Warren, Essex, Hamilton, Clinton, Franklin, and St. Lawrence, appears from various representations to be peculiarly rich in the magnetic ores of iron. We may refer in particular to Mr. Redfield's account of his exploring visits to the northern sources of the Hudson, and to Messrs Hall and Emmons' geological reports relative to this part of the state of New York. Mr. Hall observes that "about a mile north of the inlet of lake Sandford' (the site of the settlement at McIntyre) "in the bed and on both sides of the stream, is a bed of ore which cannot be much less than 500 feet wide, and in all probability far exceeds that breadth. This bed, with one or two minor ones on each side of the stream, has been traced for three-fourths of a mile in a northerly direction, and probably continues much farther southerly, as the great number of boulders and angular fragments of ore lying on the surface and imbedded in the soil seem to indicate. Some of these boulders of ore cannot weigh less than three tons."t This ore, it appears, occurs in beds, and not in veins, since it lies "parallel to the direction of the mountain ranges, and when in gneiss, parallel to its apparent stratification." Mr. Emmons, considers "that the beds about McIntyre are parts of a belt of an iron formation, which extends southwestwardly through the wilder • American Journal of Science, vol xxxiii, p. 303, Jan. 1838. † First Geological Report of New York, Feb. 1837, p. 131. Second Geological Report of New York, Feb., 1838, p. 223. VOL. XXIII.-No. 1.-JANUARY, 1839. 1 |