 | Eli Bowen - Maps - 1852 - 456 pages
...FURNACE. headed at the other— both well hardened and tempered ; the scraper, a small iron rod with a hook on one end, to take the bore-meal out of the...one-fourth of an inch thick, somewhat tapered at one end. The tamping-bar is a bar of round iron, with a groove to fit the needle. The erection of a furnace... | |
 | Eli Bowen - Mines and mineral resources - 1853 - 530 pages
...a mallet of from five to six pounds weight, and LOCOMOTIVE SKETCHES. the hole ; and a copper needk, which is a simple wire one-fourth of an inch thick, somewhat tapered at one end. The tamping-bar is a bar of round iron, with a groove to fit the needle. The erection of a furnace... | |
 | William Bromwell - Locomotives - 1854 - 208 pages
...FURNACE. headed at the other — both well hardened and tempered ; the seraper, n small 'ron rod with a hook on one end, to take the bore-meal out of the...one-fourth of an inch thick, somewhat tapered at one end. The tamping-bar is a bar of round iron, with a groove to fit the needle. The erection of a furnace... | |
 | Eli Bowen - Mines and mineral resources - 1854 - 528 pages
...iron or steel, edged at one end and FROST TTEW Or A PEJXSYLVASIA BLAST FUR5ACE. LOCOMOTIVE SKETCHES. the hole ; and a copper needle, which is a simple...one-fourth of an inch thick, somewhat tapered at one end. The tamping-bar is a bar of round iron, with a groove to fit the needle. The erection of a furnace... | |
 | Henry Stafford Osborn - Iron - 1869 - 1020 pages
...; the scraper, a small iron rod, with a square hook on one end, to take the boremeal for rock dust out of the hole ; and a copper needle, which is a...accidents from self-discharges. The tamping-bar^ Fig. 7, is a bar of round iron, with a groove to fit the needle. A few remarks in relation to blasting may... | |
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Fig. 12, which is a bar of iron or steel, edged at one end, and headed at the other — both well hardened and tempered ; the scraper, a small iron rod, with a square hook on one end, to take the boremeal out of the hole ; and a copper needle, which is... 