Since The Early Beginnings Of the Bronze and Iron age charcoal has been used for heating and reducing purposes. In the direct production of iron a mixture of ore and charcoal is placed on a charcoal fire in earth holes or on hearths and burnt down with natural draught with the direct result that an iron ball reduced in the renn fire is obtained.
in addittion to the ore investigation ,33 coal samples ori ginatting from several test pits on sumatera and kalimantan heve been invitigated in the laboratory of the djawatan.
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5 halaman,gambar tidak berwarna,dan tidak ada peta
War,occupation and the struggle for liberation, a period of destruction lasting for nearly 10 years, have left the first Indonesia government a more or less chaotic heritage. The tasks facing the various ministeries were more than complex, because the dutch administration had been out of office for years and a beginning had to be made from scratch.<…
the investigation of the typical ore and coal occources in indonesian carried out by WEDEXRO has the purpose proving their suitability for a domestic iron and steel industry
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39 halaman,gambar tidak berwarna.dan tidak ada pet
Pada penyelidikan pendahuluan yang telah dilakukan didaerah Kabupaten Pesisir Selatan, dilaporkan bahwa didaerah barangan dan sekitarnya diperkirakan terdapan endapan toseki yang terjadi oleh proses hidrotermal. Daerah Barangan dan sekitarnya terdiri dari berbagai jenis batuan seperti serpih,lanau dan kuarsit yang termasuk dalam formasi siguntur,bat…
war, accoption and the srruggle for liberation ,a priod of the destrution lasting for nearly 10 years ,have left the first indonesian goverment a more of less chaotic hertiage
To the Ukrainian coal and chemical research institute the samples of indonesian coals, taken from the following deposits were delivered:
1. Loa-pari mine, seam C (kalimantan island, the basin of the mahakam river)
2. sigihan mine (kalimantan island, the basin of the mahakam river).
An overall picture of the oil resources of indonesian involes an evalution of an extensive archipelago which occupies approximately 4% of the total area of the earth,including 19 larger islands and many thausands of smaller .
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17 halman,gambar tidak berwarna dan tidak ada peta