A treatise on isometrical drawing as applicable to geological and mining plans, picturesque delineations of ornamental grounds, perspective views and working plans of buildings and machinery, and to general purposes of civil engineering ...: With thirty-five engravings

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J. Weale, 1838 - 224 sider
 

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Side 2 - With what pains do we not rake up the old heaps of rubbish brought out of old excavations, to discover pieces which may afford us some idea of the substances which were formerly worked out? Yet, between these documents, and those which we might obtain in the way pointed out in the preceding paragraphs, there is as much difference as between night and day. Is it not an obligation, a duty, for us to collect and leave to future generations as much instruction and knowledge as possible on the labours...
Side 291 - A Treatise on Isometrical Drawing, as applicable to Geological and Mining Plans, Picturesque Delineations of Ornamental Grounds, Perspective Views and Working Plans of Buildings and Machinery, and to General Purposes of Civil Engineering ; with Details of improved Methods of preserving Plans and Records of Subterranean Operations in Mining Districts. With 34 Copper-plate Engravings. By T. SOPWITH, Land and Mine Surveyor ; Member of the Institution of Civil Engineers ; Author of " Geological Sections...
Side 149 - ... that, whatever situation be selected for them, they should be concentrated in one national settlement, where particular attention should be bestowed to keep them distinct and separate, and where their peculiar and characteristic manners should be carefully encouraged. It is much to be regretted, that so little attention has been paid to this principle, not only with respect to the Highlanders, but also the Dutch and Germans, who, in some parts, form a considerable proportion of the colonists....
Side 134 - ... side of an equilateral triangle described on dg, a portion of the edge of the first ruler; and when the shoulders b and c rest against the edges of the first ruler, the edge of the second should lie along ge, the other side of the equilateral triangle. The second ruler should have a little foot at k for the same purpose as the prominences on the first ruler, and both of them should have their edges divided into inches, and tenths, or eighths of inches. It would be convenient if the second ruler...
Side 293 - EIGHT VIEWS OF FOUNTAINS ABBEY, intended to illustrate the Architectural and Picturesque Beauties of that celebrated Ruin. Engraved from original Drawings by J. Metcalf and JW Carmichael. With an HISTORICAL and ARCHITECTURAL DESCRIPTION. By T. SOPWITH. " The sketch conveys all the general idea of Fountains that tourist or antiquary can wish, detailed with truth, spirit, and feeling.
Side 2 - Such a collection, the plan and description of the district, form together a complete and instructive whole. If our ancestors had left us such documents for two centuries past, or even for half a century, what advantage would it not have been to us ? From what doubts would it not relieve us ? With what anxiety do we not turn over the leaves of ancient chronicles in search of information, often very imperfect, obscure, and uncertain ? With what pleasure do we not receive the least sketch or plan of...
Side 11 - It is obvious that many collieries which are now open will sooner or later be shut up, and lie dormant for various and indefinite periods — and the probability is, that in many cases all knowledge of the dykes which intersect them may be lost, and that the parties having to re-open them may be as ignorant, or even more so, than those who first opened these mines.
Side 39 - ... with respect to both the points, so as not to be nearer to one point than the other. It is difficult also so to carry the needle, or pen, that it shall neither incline more to one side than the other of the rule ; and, thirdly, it is very difficult to find a rule that shall be perfectly straight. "If the two points be very far distant, it is almost impossible to draw the line with accuracy and exactness ; a circular line may be described more easily, and more exactly, than a straight or any other...
Side 134 - The groove should be of such a size, that when its shoulders, a and d, are in contact with, and rest against the edges of the first ruler, the edge of the second ruler should coincide with de, the side of an equilateral triangle described on dg, a portion of the edge of the first ruler ; and when the shoulders, b and c, rest against the edges of the first ruler, the edge of the second should lie along ge, the other side of the equilateral triangle. The second...
Side 133 - ... so as to contain with the former ruler, in either position, an angle of 60 degrees. The groove should be of such a size, that when its shoulders a and (/ are in contact with, and rest against the edges of the first ruler, the edge of the second ruler should coincide with de, the side of an equilateral triangle described on dg, a portion of the edge of the first ruler; and when the shoulders b and...

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