The Surveyor, Engineer, and Architect, Band 21841 |
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Seite 229 - From the highest points of the Ohio to where I am now writing, and far up the upper Mississippi and Missouri, the more the country is explored and peopled, and the more its surface is penetrated, not only are there more mounds brought to view, but more incontestable marks of a numerous population. " Wells, artificially walled, different structures of convenience or defence, have been found in such numbers, as no longer to excite curiosity.
Seite 63 - ... curved so as to prevent the eye from seeing farther than a quarter of a mile of it, in any one place, the whole road would not be lengthened more than one hundred and fifty yards. It is not proposed to make serpentine roads merely for the entertainment of travellers; but it is intended to point out that a strict adherence to a straight line is of much less consequence than is usually supposed.'— Edgeworth, p.
Seite 229 - And they came to Elim, where were twelve wells of water, and three score and ten palm trees, and they encamped there by the waters.
Seite 80 - An Act to amend an Act of the first and second years of His late Majesty King William the Fourth, to empower landed proprietors in Ireland to sink, embank, and remove obstructions in rivers.
Seite 97 - 1. That we consider the principle of atmospheric propulsion to be established, and that the economy of working increases with the length and diameter of the tube. " 2. That the expense of the formation of the line in cuttings, embankments, bridges, tunnels, and rails, will be very little less than for equal lengths of a railway to be worked by locomotive engines ; but that the total cost of the works will be much greater, owing to the expense of providing and laying 'the atmospheric tube, and erecting...
Seite 64 - ... zinc, that they apparently sustained the immense pressure of four hundred atmospheres, without bursting; but if the end of an iron rod was slightly pressed against the extremity of the tube, and the rod caused to vibrate longitudinally, by rubbing it with a leather glove covered with resin, the tube was invariably shattered to pieces. Hence he concludes, that something more than the simple excess of pressure of steam in the boiler is necessary to cause an explosion, and that a slight vibratory...
Seite 64 - ... liable to explode than others. Much depended on care and management. He believed that he was in possession of accounts of nearly all the explosions which had occurred in Cornwall since the expiration of Mr. Watt's patent, when higher pressures began to be used, and they amounted only to five or six instances, exclusive of some cases of collapsed flues. More explosions had occurred in a small district round Wednesbury during the present year, with low-pressure boilers, than in Cornwall in forty...
Seite 123 - The total cost of this work will amount to about 210,000/., or 4,565/. per mile. Allusion is made to a proposed junction canal between the rivers Boyle and Shannon, which may be considered as an extension of the Ulster Canal westward, effecting a junction between all the navigations of Ireland. By its means the produce of the town of Boyle, and the agricultural district around it, would be conveyed directly by steam to Belfast and Newry. At the time of this communication, the Ulster Canal was rapidly...
Seite 97 - ... 3. That the expense of working a line on this principle, on which trains are frequently passing, will be less than working by locomotive engines, and that the saving thus effected will, in some cases, more than compensate for the additional outlay ; but it will be the reverse on lines of unfrequent trains. However, there are many items of expense of which we have no knowledge, and can form no opinion, such as the wear and tear of pistons, valves, &c.; and on these further experience is needed.
Seite 133 - And the said covenantor doth hereby, for himself, his heirs, executors, and. administrators, covenant, promise, and agree with and to the said covenantee, his heirs and assigns, in manner following ; (that is to say,) 2.