Cyclopędia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 7George Virtue, 1852 |
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Pagina 455
... side of the wheel - head , with his elbows supported on his knees when his hands require to be kept steady , takes one of these balls , dashes it down upon the centre of the revolving - board , and with both 455 hands kept wet by ...
... side of the wheel - head , with his elbows supported on his knees when his hands require to be kept steady , takes one of these balls , dashes it down upon the centre of the revolving - board , and with both 455 hands kept wet by ...
Pagina 457
... side of the article , or the upper surface of the model in plaster . Plates , dishes , saucers , cups , and hand basins are now made by the process of flat - ware pressing , an operation which is conducted as fol- lows : -a plate being ...
... side of the article , or the upper surface of the model in plaster . Plates , dishes , saucers , cups , and hand basins are now made by the process of flat - ware pressing , an operation which is conducted as fol- lows : -a plate being ...
Pagina 465
... side next the ware , and rubbing it in with a flannel rubber . At first this is done gently , then more forcibly , until the colour is fairly trans ferred . Fig . 1723 . TRANSFERRING THE PATTERN . The articles thus treated are then ...
... side next the ware , and rubbing it in with a flannel rubber . At first this is done gently , then more forcibly , until the colour is fairly trans ferred . Fig . 1723 . TRANSFERRING THE PATTERN . The articles thus treated are then ...
Pagina 471
... side was glued a piece of paper on which some able penman had transcribed the words intended to be engraved . An engraver then cut out the characters in relief , and the remains of the paper being rubbed off , the engraved tablet was ...
... side was glued a piece of paper on which some able penman had transcribed the words intended to be engraved . An engraver then cut out the characters in relief , and the remains of the paper being rubbed off , the engraved tablet was ...
Pagina 477
... side of a furnace con- taining the melting - pot and the fused type - metal , ( the composition of which is given under ANTIMONY ; see also ALLOY . ) He holds the mould in his left hand , and taking up a portion of the metal , in a very ...
... side of a furnace con- taining the melting - pot and the fused type - metal , ( the composition of which is given under ANTIMONY ; see also ALLOY . ) He holds the mould in his left hand , and taking up a portion of the metal , in a very ...
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Cyclopędia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 7 Cyclopaedia Visualizzazione completa - 1852 |
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acid action allow appears applied arranged attached becomes body bottom brine called carriage carried centre clay closed colour common consists contains copper covered cylinder direction edge effect employed engine equal evaporation fall feet fire fixed force frame give given hard heat inches increased iron Italy kind lead length less letters lever lower machine manufacture materials matter means metal method mixed motion moving nearly obtained operation passing pieces pipe placed plate portion prepared pressure prevent printing produced proportion pump quantity rails raised removed road rollers rope round salt screw separate sheet ship shown side silver soap soda solution space starch steam stone supported surface taken takes temperature thick tion tube turned upper usually various vessel weight wheel whole wood
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Pagina 488 - ... for a fresh coat of ink, which itself again distributes, to meet the ensuing sheet, now advancing for impression ; and the whole of these complicated acts is performed with such a velocity and simultaneousness of movement, that no less than 1,100 sheets are impressed in one hour.
Pagina 488 - Times newspaper, which were taken off last night by a mechanical apparatus. A system of machinery almost organic has been devised and arranged, which, while it relieves the human frame of its most laborious efforts in printing, far exceeds all human powers in rapidity and dispatch.
Pagina 488 - ... little more remains for man to do than to attend upon and watch this unconscious agent in its operations. The machine is then merely supplied with paper, itself places the...
Pagina 492 - The type form fixed on the central drum moves at the rate of 70 inches per second, and the paper is moved in contact with it of course at exactly the same rate. Now, if by any error in the delivery or motion of a sheet of paper it arrive at the printing cylinder...
Pagina 516 - ... pressure whatever can force a passage. We shall recur to this again when describing the various contrivances of valves, &c. What we have said is enough for supporting our directions for constructing a. tight piston. But we recommend thick and strong leather, while our present reasoning seems to render thin leather preferable. If the leather be thin, and the solid piston in any part does not press it gently to the barrel, there will be in this part an unbalanced pressure of the incumbent column...
Pagina 582 - ... and managing machines of that kind . A mob assembled and pulled the mill to pieces, but the damage was made good by the nation, and some of the rioters were punished. A new mill was afterwards erected, which was suffered to work without molestation, and which gave occasion to the erection of others. It appears, however, that this was not the only mill of the kind then in Britain, for one driven also by wind had been built at Leith, in Scotland, some years before.
Pagina 488 - ... little to add. Sir Christopher Wren's noblest monument is to be found in the building which he erected ; so is the best tribute of praise which we are capable of offering to the inventor of the printing machine, comprised in the preceding description, which we have feebly sketched, of the powers and utility of his invention. It must suffice to say further, that he is a Saxon by birth ; that his name is Koenig ; and that the invention has been executed under the direction of his friend and countryman,...
Pagina 654 - When the water is raised to the top it is received in channels on each side, which extend the whole length of the building ; from these long channels it is made to pass into smaller ones by the side, from which it trickles through a multitude of small holes, like a very gentle shower, upon the fagots, where it is divided into an infinite number of drops falling from one point to another.
Pagina 488 - Our journal of this day presents to the public the practical result of the greatest improvement connected with printing, since the discovery of the art itself. The reader of this paragraph now holds in his hand one of the many thousand impressions of The Times Newspaper, which were taken off last night by a mechanical apparatus. A system of machinery, almost organic, has been devised and arranged, which, while it relieves the human frame of its most laborious efforts in printing, far exceeds all...
Pagina 650 - In doing this, the men employ picks of the common description ; working horizontally, so as to form a roofing of the rock, and making this as plane as possible. From its situation, a few feet above the purer part of the stratum, the rock obtained during this process is usually of inferior quality, and is for the most part employed in the refineries. The depth of the workings from the roofings depends in a great measure on the nature of the stratum, and the proportion of it occupied by the rock of...