Useful Information for Engineers: Being a Series of Lectures


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Sivu i - Salmon; Lists of good Salmon Flies for every good River in the Empire ; the Natural History of the Salmon, its Habits described, and the best way of artificially Breeding it. Fcp. 8vo. with coloured Plates, price 14s. Fairbairn.— Useful Information for Engineers : Being a Series of Lectures delivered to the Working Engineers of Yorkshire and Lancashire.
Sivu 92 - Manchester and the surrounding districts, and compare it with what it was at the close of the last and the commencement of the present century, we shall find that at that period the useful and industrial arts were comparatively of little importance.
Sivu 132 - ... passing from the solid to the liquid, and from the liquid to the gaseous form, or the contrary, occasioning endless vicissitudes of temperature over the globe.
Sivu 203 - By his admirable contrivance, it has become a thing stupendous alike for its force and its flexibility, for the prodigious power which it can exert, and the ease, and precision, and ductility, with which it can be varied, distributed, and applied. The trunk of an elephant, that can pick up a pin or rend an oak, is as nothing to it.
Sivu 168 - Prom them we may infer, that the steam, while expanding in the cylinder, loses heat in quantity exactly proportional to the mechanical force which it communicates by means of the piston ; and that on the condensation of the steam, the heat thus converted into power is not given back.
Sivu 22 - This occurrence seems to prove that rarefaction produced in the flues of a high pressure boiler may determine an explosion. The boiler which exploded belonged to a set of three feeding the same engine; the fuel used was bituminous coal. The furnace doors of all three of the boilers had been opened, and the dampers of two had been closed, when a gust of flame was seen to issue from the mouth of the furnace of these latter, and was immediately followed by an explosion. The interior flue of this boiler...
Sivu 223 - ... is considerable, we may fairly assume the following relative strengths as the value of plates with their riveted joints:— Taking the strength of the plate at 100 The strength of the double-riveted joint would then be . 70 And the strength of the single-riveted joint...
Sivu 120 - ... ship being in a state of tension, it is, on the contrary, in a state of compression, and the whole of those parts below the neutral axis are subjected to that strain. On the other hand, the upper part is in a state of tension...
Sivu 79 - Fahrenheit, and at this temperature the products of combustion would be increased, according to the laws of the expansion of aeriform bodies, to about three times their original bulk. The bulk, therefore, of the products of combustion which must pass off must be 154-814 x 3 = Ф64-442 cubic feet.
Sivu 79 - ... conditions are not fulfilled, but that a large surplus quantity of air is always admitted. A limit is thus found for the area over the bridge, or the area of the flue immediately behind the furnace, below which it must not be decreased, or the due quantity could not pass off and consequently the due quantity of air could not enter and the combustion would be proportionally imperfect. It will be found advantageous in practice, to make the area 2 square inches instead of '516 square inch. The imperfection...

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