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Page 28 - The continuation of the tunnel into the shore on either coast I should dispense with ; and in order that it should have a partial freedom of motion, it should terminate with solid ends before reaching the shores. To these points, chain piers should extend ; or, if strict economy were aimed at in this item, the communication might be by small steamers.
Page 67 - The condensing pumps used in compressing I make of different capacities, according to the densities of the fluid to be compressed, those used to compress the higher densities being proportionately smaller than those previously used to compress it to the first or lower densities,
Page 121 - Fig. 11, is opened at the beginning of each stroke by the motion of the subsidiary piston, which is controlled by the cataract ; and a pause is consequently given at the completion of each single stroke of the engine, which allows time for the pump valves to fall to their seats. Slip in the water is by this means prevented, as well as the shock which occurs when pump valves close nnder the pressure from a moving plunger.
Page 110 - Architects in general have no other ideas of proportion in the opening of a chimney, than what relate to symmetry and beauty, respecting the dimensions of the room ; * while its true proportion, respecting its function and utility, depends on quite other principles...
Page 110 - Frame, (Plate, Fig. 2,) giving it two springing angular Sides, and then replacing it, with Hinges below on which it may be turned to open more or less above. It will then have the Appearance of an internal Skylight. By drawing this Pane in, more or less, you may admit what Air you find necessary. Its position will naturally throw that air up and along the ceiling.
Page 93 - Palladio only mentions two which stood in the middle of the rooms, and consisted of columns, supporting architraves, whereon were placed the pyramids or funnels through which the smoke was conveyed. Scamozzi mentions only three in his time, placed similarly.
Page 27 - But quickly recovering himself, he adds, " The operation will be attended with no extraordinary difficulty to those who can remain during half an hour in deep water." Turning to the shore ends, he observes, " As regards that part of the tunnel which would be near the shore, it would be sunk underground, and covered with stones fastened together, so as to render them immovable.
Page 93 - In England, Inigo Jones designed some very elaborate chimney-pieces. The size of the chimney must depend upon the dimensions of the room wherein it is placed : the chimney should always be situated so as to be immediately seen by those who enter : the middle of the side partition wall is the best place in halls, saloons, and other rooms of passage to which the principal entrances are commonly in the middle of the front or of the back wall ; but in drawingrooms, dressing-rooms...
Page 164 - ... from it the tarry matters. " The number of retorts requisite to furnish a given volume of gas is much less than in the manufacture from coal. On the other hand, the dimensions of the furnace are considerably greater, because the consumption of fuel must be more rapid, in order to supply the heat which is carried off by the copious formation of gas. " Gas may be made from peat at a comparatively low temperature, but its illuminating power is then trifling. At a red heat alone can we procure a...
Page 93 - CHIM'NEY, in architecture, a body of brick or stone erected in a building, containing a funnel to convey smoke and other volatile matter through the roof from the grate or hearth. How far the Greek and Roman architects were acquainted with the construction of chimneys is a matter of dispute. No traces of them have been discovered in the ruins of Pompeii, and Vitruvius gives no...

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