The London Journal of Arts and Sciences, Bind 4Sherwood, Neely, and Jones, 1822 Containing reports of all new patents, with a description of their respective principles and properties: also, original communications on subjects connected with science and philosophy; particularly such as embrace the most recent inventions and dicoveries in practical mechanics. |
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Side 57
... cylinder , and partly on the other ; by which means , as the form passes to and fro , it receives its sup- ply of ink without being carried out to a considerable distance , as is the case in other printing machines , where the form is ...
... cylinder , and partly on the other ; by which means , as the form passes to and fro , it receives its sup- ply of ink without being carried out to a considerable distance , as is the case in other printing machines , where the form is ...
Side 58
... cylinders or drums , which are only half the diameter of the pressing cylinder ; b , is connected , by means of toothed wheels and pinions , to the pressing cylinder ; and a has also a toothed wheel upon its axle , which connects it ...
... cylinders or drums , which are only half the diameter of the pressing cylinder ; b , is connected , by means of toothed wheels and pinions , to the pressing cylinder ; and a has also a toothed wheel upon its axle , which connects it ...
Side 59
... cylinder can be supplied with more sheets of paper in any given time , than when one feeder only is used ; and thus ... cylinder ; and the combination of two paper feeders with a printing cylinder which prints in one direction only ...
... cylinder can be supplied with more sheets of paper in any given time , than when one feeder only is used ; and thus ... cylinder ; and the combination of two paper feeders with a printing cylinder which prints in one direction only ...
Side 69
... cylinder parallel to each other , with such an obliquity to the axis that they may each form a suit- able shearing ... cylinder . Three cutting bars are suggested as the most desirable number to be twisted round a cylinder of two inches ...
... cylinder parallel to each other , with such an obliquity to the axis that they may each form a suit- able shearing ... cylinder . Three cutting bars are suggested as the most desirable number to be twisted round a cylinder of two inches ...
Side 70
... cylinder . In order to form these cutting bars with per- fect accuracy , it is proposed that six bars of steel shall be wound round a cylinder , and there operated upon by turning or grinding until they have acquired a truly con ...
... cylinder . In order to form these cutting bars with per- fect accuracy , it is proposed that six bars of steel shall be wound round a cylinder , and there operated upon by turning or grinding until they have acquired a truly con ...
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Side 36 - LOUDON'S ENCYCLOPEDIA of AGRICULTURE: comprising the Laying-out, Improvement, and Management of Landed Property, and the Cultivation and Economy of the Productions of Agriculture. With 1,100 Woodcuts. 8vo. 21s. London's Encyclopaedia of Gardening : comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape Gardening.
Side 169 - Middlesex, for certain improvements in the construction of lamps, whereby they are rendered capable of burning concrete oils, animal fat, and other similar inflammable substances.
Side 147 - It may be added, that when the machinery of the mill has attained its proper speed, certain balls rise by their centrifugal force, so as to draw a box below the reach of a bell handle, which will then cease to ring a bell, placed in some convenient situation for the purpose. But, should the men at the wheels cease to keep up the requisite speed in the mill-work, the balls will descend, and a projecting pin on the box striking the handle, placed in the proper situation for that purpose, will continue...
Side 263 - ... pounds, two hundred and thirty-two feet, in a minute ; and of working, on an average, eight hours per day. This is equivalent to the work of thirty-four men; twenty-five square feet of canvas performing the average work of a day-labourer.
Side 148 - Roofs or Beams; and Gladstone's, for a Method of increasing the Strength of Timbers; to these it may be useful to add the two following Inventions. Mr. Smart, of Westminster Bridge Road, having been long convinced of the great convenience of flat roofs in London, and other great towns, where space is valuable, considered that their principal objection arose from the necessity of very strong bearings, which were necessarily weighty and expensive. To obviate this he devised the Bow and String Rafter,...
Side 157 - Is magnetism identical with electricity, or an independent agent put in motion or activity by electricity? Queries of this kind might be considerably multiplied, and stated in more precise and various forms : the solution of them, it must be allowed, is of the highest importance; and though some persons have undertaken to answer them in the most positive manner...
Side 257 - ... this way than when salted. The sugar gives no disagreeable taste. This process is particularly valuable in making what is called Kippered Salmon; and the fish preserved in this manner are far superior in quality and flavour to those which are salted or rit smoked.
Side 40 - ... the obstacles that present themselves to the passage of the oxygen in the former case, on account of the greater depth and smaller surface of the root. It was further observed, that roots which penetrate into dung, or. into pipes conducting water, divide into immense numbers of fibres, and form what is called, the fox-tail root ; but it is, because they cannot continue to vegetate, except by increasing their points of contact, with the small quantity of oxygen found in such mediums. Lastly, it...
Side 98 - In every instance that an oil, whether volatile or fixed, was heated with corrosive sublimate, mutual decomposition took place, charcoal was evolved, and muriatic acid and calomel formed. Besides, when oil of turpentine was used, some traces of artificial camphor appeared...
Side 177 - ... or the ship would not be in danger of being pooped, although no dead-lights were employed; at the same time it would be a sufficient protection to cabin windows, for it is only when water is kept in a compact body that it is...