Full resolution (JPEG) - On this page / på denna sida - Second part - IX. Mining Industry and Metal Production - 1. The Iron Mines (together with information regarding other mines). By the late Prof. O. G. Nordenström - Ore raised and exported - Technics of mining
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TECHNICS OF MINING. 697
Table 100. Iron ore exports of Sweden, in 1888/1U03. Metric tons à 2,204 lbs.
Years.
Exported from
[-Grängesberg.-]
{+Gränges-
berg.+} ’
The
Lapp-land fields.
Total
Exports.
Exported to
Eastern
Germany.
Western
Germany.’
England.
188 8............... 31,144 70,622 117,350 31,972 7,220 65,406 12,758
188 9............... 56,415 34,815 118,573 69,409 24,956 12,760 11,448
189 0............... 103,875 27,520 187,732 122,773 35,777 6,390 22,792
189 1............... 126,892 450 174,148 83,711 72,463 3,220 14,754
! 1892............... 126,515 139,194 320,071 i 112,959 183,821 11,371 11,920
189 3............... 204,973 260,754 484,055 102,990 324,474 37,356 19,235
189 4............... 289,267 525,729 831,395 | 153,814 573,605 85,197 18,779
189 5............... 393,685 384,007 800,452 I 166,923 520,170 75,165 38,194
189 6............... 496,102 625,795 1,150,095 217,507 737,598 87,203 108,387
189 7............... 539,956 828,315 1,400,hoi 269,671 943,612 95,076 92,442
189 8.............. 579,787 821,267 1,439,8*0 260.977 997,510 101,600 79,773
189 9............... 568,473 1,023,698 1,628,011 396,583 1,007,051 123,239 101,138
190 0.............. 531,904 1,054,675 1,019,002 422,625 967,249 102,772 127,256
190 1............... 646,991 1,090,108 1,701.257 445,060 1,073,806 91,991 150,400
190 2............... 609,070 1,074,434 1,729,303 404,288 954,670 173,726 196,619
1903* ............ • 2,070,000 2,*2s,000 ....
A great incentive to such an advance lies in this that the net proceeds
of the ore export does not on the whole come very high. That during
present conditions, however, an entering on a large scale into
manufacturing industry would be financially impossible, most authorities agree.
Technics of mining.
In the foregoing it is already intimated that our Swedish mining
industry shows a very original development and is of a considerable
historical interest. In the following presentation, which in the first
place has for its object the treatment of present conditions, other mines
also than the iron ones and especially our coal mines, have for the sake
of better connection been taken up.
Prospecting for iron ore deposits and their exploration. In
prospecting for both iron ores and other ores, magnetic instruments have long been
used in Sweden. In no other country magnetic instruments have been used so
long and to such a great extent for the discovery of ores as in Sweden, and
nowhere these instruments have reached such perfection as here.
For discovering iron ores and for getting an idea of their position and extent,
the so-called miners’ compass, has been used for about 150 years; it is
considered to be discovered by D. Tilas. This compass is also used for discovering
other ores than iron ore, such as zinc, lead, and copper ores, which, on account
of impregnation of magnetite or magnetic pyrites, are attractive.
As a rule, the miners’ compass is used for discovering ores and in
preliminary exploring work in ore-fields. Since the demand upon still more accurate
results has increased, magnetic instruments for exploring-work in ore-fields have
1 As exports from Grängesberg are counted the exports via Oxelösund. — ’ Quantities
reported in our Commercial Statistics as exported to the Netherlands. — ’ Belgium, France,
Finland, etc. — 4 Provisional figures.
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