London Journal of Arts and Sceinces: And Repertory of Patent Inventions, Volumen4William Newton, Charles Frederick Partington W. Newton, 1822 |
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... present year . They have ever felt persuaded that a Journal like this , exhi biting the earliest improvements in the ARTS and MANUFAC- TURES , must be a valuable repository of useful knowledge ; and , as such , their labours have been ...
... present year . They have ever felt persuaded that a Journal like this , exhi biting the earliest improvements in the ARTS and MANUFAC- TURES , must be a valuable repository of useful knowledge ; and , as such , their labours have been ...
Página 10
... present mode of paving streets and roads permanent for any reasonable length of time ; this he considers to arise from the unconnected manner in which the ordinary paving stones are placed . He has also 10 Recent Patents .
... present mode of paving streets and roads permanent for any reasonable length of time ; this he considers to arise from the unconnected manner in which the ordinary paving stones are placed . He has also 10 Recent Patents .
Página 12
... present inconveniences attendant on paved roads ; but we fear the expense of hewing the stones to the shape will be an insuperable bar to its in- troduction . A still further improvement in the pave- ment of the streets of London , and ...
... present inconveniences attendant on paved roads ; but we fear the expense of hewing the stones to the shape will be an insuperable bar to its in- troduction . A still further improvement in the pave- ment of the streets of London , and ...
Página 14
... have adopted , as at present appearing to me the most convenient ; and the chief novelty which I claim with respect to that movement , is its application to the purpose of carrying the index used in sewing 14 Recent Patents .
... have adopted , as at present appearing to me the most convenient ; and the chief novelty which I claim with respect to that movement , is its application to the purpose of carrying the index used in sewing 14 Recent Patents .
Página 16
... present situa- tion to another fermenting vat , by drawing off the water , and disengaging the head , b , from its place . The plate is furnished with circular wedges round the circumference , as seen at i , i , made to act 16 Recent ...
... present situa- tion to another fermenting vat , by drawing off the water , and disengaging the head , b , from its place . The plate is furnished with circular wedges round the circumference , as seen at i , i , made to act 16 Recent ...
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1st Sat 2d Sat acid action advantage alpaco anchor animal annatto apparatus appears applied axle balance spring bars boat boiler bottom carbonic acid carriage chevaux-de-frise colour conj consists construction containing contrivance copper Coppermine River cylinder described Diff drawing rollers eclipsed effect employed engine engraving essential oil experiments feet fixed furnaces heat holes Holyhead improved inches Institution invention iron joints Journal of Arts June labour lamp leeches length lever London machine magnesia manual labour manufacture means ment metal method Middlesex mode months for inrolment muriate observations obtained operation passing patent Perigee piece pipe placed plate present produced proposed purpose quantity reservoir rollers ropes round screw shank shewn side Society specific gravity specification spring steam substance surface tallow temperature timber tion tube upper verdigris vessel vicuna volume wheel wick wrought iron
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Página 274 - ... if it make a slight impression, denoting some degree of malleability, the iron is of a good quality, provided it be uniform; if fragments fly off, and no sensible indentation be made, the iron will be hard and brittle.
Página 146 - ... repairs in the machinery ; and should the supply of corn, &c. at any time, fall off, it is not necessary that the labour of the prisoners should be suspended; nor can they be aware of the circumstance. The...
Página 280 - Fifty lithographic prints, illustrative of a tour in France, Switzerland, and Italy, during the years 1819, 20, and 21, from original drawings taken in Italy, the Alps, and the Pyrenees, by MARIANNE COLSTON, in octavo, are preparing for publication.
Página 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.
Página 273 - N. down to hit. 69 deg. comprising an extent (reckoning the indentations and sinuosities observed) of about 800 miles ! The coast visited by Captain Scoresby is a continuation towards the North of that on which were planted the ancient colonies from Iceland, the fate of which is still veiled in such deep obscurity.
Página 268 - The poets tell us, that there is a pleasure in poetic pains, which only poets know. So it may, with truth, be said, there is a labour in the historian's researches, which only historians can know: days, nay weeks, are sometimes consumed in ascertaining a date, or verifying a fact. Mr. Partington appears to have spared no pains to render his work what he, doubtless, designed it to be, and which, in truth, it is, a fair epitome of what is known relative to that stupendous machine, the steam-engine,...
Página 157 - Is magnetism identical with electricity, or an independent agent, put into 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...