The Polytechnic Journal, Volume 7

acid advantage agricultural ammonia anchor animal apparatus appears applied attention axle battery boiler carbon carriages chemical coal colour combustion communication considerable consists construction contained copper county of Middlesex cylinder Ditto ditto Douglas Bay Duke of Chartres Duke of Orleans Dumouriez effect electrotype employed engine engraving evaporated experiments favour feet flue fuel furnace Gent Guano heat horse improvements in machinery inches interest invention iron JOHN letters patent lime locomotive London manufacture manure matter means ment Messrs metal meter Middlesex mode months for inrolment nitrate of soda object observed obtained ordinary oxygen patent perfect phrenology pipe plate practical present principle produced purpose quantity railway render road Royal salt Sealed ships shoe silver society soda soil solution standing rigging steam street substances sulphate surface tion vegetable vessel Victoria rooms weight wheels WILLIAM wire wire-rope zinc