Mechanics' Magazine, Volume 32Knight & Lacey, 1840 - Technology |
From inside the book
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Page 11
... means of hot coal tar ! Now I did this to Mr. I. R. Bell's garden walks at Black- heath , in 1816. I strongly recommended it in your pages in 1825 ; and in June 1838 , I proposed the operation to Lord Hill , as may be seen in the Naval ...
... means of hot coal tar ! Now I did this to Mr. I. R. Bell's garden walks at Black- heath , in 1816. I strongly recommended it in your pages in 1825 ; and in June 1838 , I proposed the operation to Lord Hill , as may be seen in the Naval ...
Page 18
... means of top- ping up the propeller immediately out of the water , and making sail to economise their fuel . " 12. To yachts that desire the means both of sailing and steaming . 13. To iron boats fitted for transporting troops across ...
... means of top- ping up the propeller immediately out of the water , and making sail to economise their fuel . " 12. To yachts that desire the means both of sailing and steaming . 13. To iron boats fitted for transporting troops across ...
Page 20
... means of a crank . In this machine , however , the motion of the pens was too rapid , and they struck against the alternate ends of the cylinder with great violence . An improvement upon this rude appa- ratus consisted in supporting the ...
... means of a crank . In this machine , however , the motion of the pens was too rapid , and they struck against the alternate ends of the cylinder with great violence . An improvement upon this rude appa- ratus consisted in supporting the ...
Page 45
... means to prevent forgery of stamps . water - marks in paper , and engine - turned engraving , and also for an indelible ink , so that characters once written with it on any writing material cannot be oblite- rated . The decision is to ...
... means to prevent forgery of stamps . water - marks in paper , and engine - turned engraving , and also for an indelible ink , so that characters once written with it on any writing material cannot be oblite- rated . The decision is to ...
Page 48
... means of guarding against the fatal cala- mities too often attending metropolitan fires . Attention to this subject on the part of London parishes , is more needful than ever , since the failure and breaking up of that precious piece of ...
... means of guarding against the fatal cala- mities too often attending metropolitan fires . Attention to this subject on the part of London parishes , is more needful than ever , since the failure and breaking up of that precious piece of ...
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Common terms and phrases
acid advantage æther angle apparatus appears applied Argand burner Birmingham boat boiler braces bridge Bude light burner canal carbonic acid carriage cast iron cause centre Charles Blagden chemical affinity Clovis coal common conductors construction copper cylinder diameter diving bell effect Ellesmere Canal employed engine engraving equal experiments feet fire flame fluid Galignani glass heat horse improvements inches invention iron John Robison length letter light Liverpool London machine machinery Magazine manufacture mastic means Mechanics ment Messrs metal miles mode motion object observed obtained operation paddle paddle-wheel paper passing patent piece pipe piston plate present pressure principle produced propelling pulley purpose quantity Railway ratus rectangular floats render rope screw shaft ship side six months steam steam-engine stove sufficient surface Telford tion trapezium floats treenails tube valve vessel W. A. Robertson weight wheel zinc
Popular passages
Page 461 - Almighty's form Glasses itself in tempests; in all time, Calm or convulsed, — in breeze, or gale, or storm, Icing the pole, or in the torrid clime Dark heaving; — boundless, endless, and sublime. The image of eternity, the throne Of the Invisible; even from out thy slime The monsters of the deep are made; each zone Obeys thee; thou goest forth, dread, fathomless, alone.
Page 461 - Thou glorious mirror, where the Almighty's form Glasses itself in tempests; in all time Calm or convulsed — in breeze, or gale, or storm, Icing the pole, or in the torrid clime Dark-heaving; boundless, endless, and sublime — The image of Eternity — the throne Of the Invisible; even from out thy slime The monsters of the deep are made; each zone Obeys thee; thou goest forth, dread, fathomless, alone.
Page 89 - Lavoisier from thinking any such opinion warranted, that till he was prevailed upon to repeat the experiment himself, he found some difficulty in believing that nearly the whole of the two airs could be converted into water.
Page 90 - Watt did ; and the dates here become very material. It appears that he wrote a letter to Dr. Priestley on 26th April, 1783, in which he reasons on the experiment of burning the two gases in a close vessel, and draws the conclusion, " that water is composed of dephlogisticated air and phlogiston, deprived of part of their latent heat."* The letter was received by Dr.
Page 221 - An Act to secure to Proprietors of Designs for articles of Manufacture the Copyright of such Designs for a limited Time.
Page 89 - Mr. Cavendish then burned in the same way dephlogisticated and inflammable airs (oxygen and hydrogen gases) , and the deposit was always more or less acidulous, accordingly as the air burnt with the inflammable air was more or less phlogisticated. The acid was found to be nitrous. Mr. Cavendish states, that " almost the whole of the inflammable and dephlogisticated air is converted into pure water.
Page 31 - The metal is a combination of copper and zinc, the best admixture being found to be 60 per cent, of the former, and 40 per cent, of the latter. The...
Page 55 - I scratched the initials of my name rudely on the plate, taking special care that the cement was quite removed from the scratches, that the copper might be thoroughly exposed. This was put in action in a cylindrical glass vessel, about half filled with a saturated solution of sulphate of copper. I then took a common...
Page 22 - A TREATISE ON A BOX OF INSTRUMENTS, And the Slide Rule ; with the Theory of Trigonometry and Logarithms, including Practical Geometry, Surveying, Measuring of Timber, Cask and Malt Gauging, Heights, and Distances. By THOMAS KENTISH. In one volume. 12mo.
Page 38 - ... along with from one to three per cent, of their weight of carburet of manganese, and exposing the crucible to the proper heat for melting the materials, which are, when fluid, to...