directed towards the centre of the openings of the jets. The pressure of the gas in all the conduits is inch of water. Condenser of cast-iron plates.—This contains 3,700 pounds of iron, in bars, kept cool by water from the pipe y y, in order to cool the gas and precipitate the water. Fifteen and a half gallons of water, heated to 30° Centigrade, flow in a minute when working with the reheating furnace alone. Nearly double will be required when working with the auxiliary furnace at the same time. Thirty-six gallons of tar are collected per week. The tube y y turns back and forward by an angle of 120°, to wet the bars, situated below, by means of small holes. Reheating furnace with Siemens' regenerators.-The furnace may be placed at a long distance from the condenser. The temperature calcu lated from the cold air used to burn the gas is about 2,000° Centigrade. The following shows the composition of the gas, which is the same before and after the condensation: The mixture before condensation contains 33 parts by weight of water to 100 of dry gas. (For other details, see explanations upon the plate.) Brand. Effects. Test number. APPENDIX D. RESULTS OF EXPERIMENTS BY DAVID KIRKALDY ON BESSEMER STEEL AND SWEDISH IRON. General abstract of the results of experiments to ascertain the mechanical properties of eleven bars of billet iron from the Ultimate permanent depression. Effects. Test number. 2,246 11, 230 HHH 1597 19, 500 1607 1622 19,000 19,000 AW 1323 AW 1313 19,500 18,500 WC 1293 18,250❘ 41,878 20,000 19,750 43.0 67.8 38.1 very slowly. 42, 624 45.8 73.6 42.7 ....do 42, 528 44.7 72.7 40.5 ..do..... 1618 100,000 329 41, 548 45.7 73.6 40.2 ..do.... 1623 100,000 335 42, 433 45.9 72.9 40.8 100,000 .328 41,832 44.2 69.8 40.8 18, 000 41, 924 cracked. Uncracked;bent 5 inches. 44, 532 44.9 55.8 31.5 .do. 1299 100,000 320 28.3 do 1287 7, 200 15,728 45.8 1.88 1, 049 2,293 11, 465 Do. 43, 780 45. 1 75.4 40.0....do..... 1294 100, 000 .328 29.1...do 1292 6, 780 15, 320 44.2 2.37 988 2,234 11, 170 Do. 18,000 42, 048 42.8 73.6 41.2...do. 1304 100,000 .348 30.8...do 1297 6,500 15, 256 43.2 2.45 947 2,224 11, 120 Do. 15, 020 42.6 2,50 933 2, 189 10,945 | Do. .do 1307 6, 250 14, 318 43.6 3. 14 911 2,087 10,435 Do. 6,626 GROVE, SOUTHWARK STREET, LONDON, S. E., July 20, 1867, Messrs. A. FRODING & CO., Gothenburg, Sweden, per Mr. S. H. LUNDH, 9B, New Broad street, London. Elastic stress. Effects. Test number. 40,000. 41,000. 42,000. 43,000. 44,000. Test number. Billets stamped. Description. ORIGINAL. Results of experiments to ascertain the resistance to extension, set, and rupture, under a pulling stress, and to permanent depression under a thrusting stress, of four Fagersta steel wire billets, manufactured by Christian Aspelin, esq., Sweden. PULLING STRESS. 20,000. 21,000. 22,000. 23,000. 24,000. 25,000. 26,000. 27,000. 28,000. 1.128 1.0000 .040 .042 .043 .044 .046 .047 .048 .049 .050 .052 .053 .055 .070 . 078 .087 .108 .018 .143 . 173 .218 251 .036 .037 .038 .042 .050 .060 0.71 .088 102 .303 .332 .391 .484 .010 .020 .010 STRESS IN POUNDS PER SQUARE INCH.-EXTENSION AND SET, INCH. .028 335 .398 .429 .500 .542 .051 082 180 234 332 432 STRESS IN POUNDS PER SQUARE INCH.-EXTENSION AND SET, INCH. .61 Pounds. 53, 924 Inch. Sq. inch. Sq. inch. Pounds. Inch. 2922 .7078 70.78 184, 545 1.08 10.8 51, 640 .57 .2552 .7448 74.48 202, 351 1.61 16. 1 47,392 .58 2642 .7358 73.58 179, 380 2. 10 21.0 46,896 .57 .2552 .7448 74.48 183, 761 2.51 25.1 GROVE, SOUTHWARK STREET, LONDON, S. E., June 1, 1867. CHRISTIAN ASPELIN, Esq., Norberg and Fagersta, Sweden. Agent, Mr. S. H. LUNDH, 9B, New Broad Street, London. 116,000. 124,000. 132,000. 140,000. 148,000. Test number. Billets stamped. Description. STRESS IN POUNDS PER SQUARE INCH.-PERMANENT DEPRESSION, INCH. 156,000. 164,000. Height. Diameter. Results of experiments to ascertain the resistance to extension, set, and rupture, under a pulling stress, &c.—Continued. THRUSTING STRESS. ORIGINAL. STRESS IN POUNDS PER SQUARE INCH.-PERMANENT DEPRESSION, INCH. Area. 172,000. 180,000. 188,000. 196,000. 36,000. 44,000. 52, 000. DAVID KIRKALDY. 60,000. 68,000. 76,000. 84,000. 92,000. 100,000. 108,000. General abstract of the results of experiments to ascertain the mechanical properties, &c., of twelve hammered bars of Fagersta steel of various degrees of hardness, manufactured by Christian Aspelin, esq., Sweden. Effects. Ultimate permanent General abstract of the results of experiments, &c.—Continued. THRUSTING STRESS: LENGTH=TWO DIAMETERS. THRUSTING STRESS: LENGTH = FOUR DIAME TERS. THRUSTING STRESS: LENGTH ONE DIAM ETER. |