Royal Cornwall POLYTECHNIC SOCIETY

ISBN 13: 9781130775396

POLYTECHNIC SOCIETY

 
9781130775396: POLYTECHNIC SOCIETY

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1868 Excerpt: ...in any other mining districts, advantageously applicable to the Cjruish Mines. To be accompanied by the necessary drawings. 4. MINERAL VEINS.'--A premium of £2 by the Society, and £3 by Oolonel Tremaync, for the most exact account of the phenomena of mineral veins in any mine or district, their dip, direction, variations in productiveness, slides, heaves, &?. Toe society being especial y desirous of cultivating close habits of observation in our miners, will give prizes for accurately drawn cross sections; for collections of ore anl country in which the relations of one to the other are carefully ma'ked; for drawiugs an J descriptions of any remarkable phenomena observed in lodes, &c. JTott.--The introduction of improved methods of drawing the ores and rubbish from the Cornith mines appears to the committee to u.-worthy of atteution with reference to these premiums. 5. WORKING PLAN OF A MINE.--A premium of £5 8s. bj the Society, for the beat working plan of a mine in fall work (sections of the lodes not required). The plan to be corrected to some time within three months previous to its exhibition._To be drawn by the person who dialled the mine-workings. 0. The following has been forwarded by Charles Fox, Esq. "The value of copper ore in any state is soon ascertained, and unless of very low produce, can bear the expense of carriage. Tin-stuff, when in considerable quantities, require! more investigation to judge of its value. In many parts of the county purchasers of it in the stone are not to be met with, whilst the expense of carriage to stamps (if the use of any be attainable) may be too heavy an item in the returning charges. This also applies to some copper halvans and skimpings. I therefore offer premiums of 3, 2, and 1 gui...

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