POLYTECHNIC ASSOCIATION OF THE AMERI CAN INSTITUTE. access of air by spreading the flame to ngreater sur the air mingles with the gas and consumes the carbon burning. A flame just at the point of beginning to of a yellowish hue. Upon these principles it is a simple thing to construct iburner which shall burn gas econom ically. Ordinary burners consume gas wastefully for the reason that the access of air to the flame is too orifices and change their direction so as properly to spreacrthe flame with little tension. We then have an smoke which objections may be partially remedied by the
POLYTECHNIC ASSOCIATION OF THE AMERI CAN INSTITUTE. access of air by spreading the flame to ngreater sur the air mingles with the gas and consumes the carbon burning. A flame just at the point of beginning to of a yellowish hue. Upon these principles it is a simple thing to construct iburner which shall burn gas econom ically. Ordinary burners consume gas wastefully for the reason that the access of air to the flame is too orifices and change their direction so as properly to spreacrthe flame with little tension. We then have an smoke which objections may be partially remedied by the especially adapted to check the flow of gas was stuffed with felt; the felt was replaced with wire gauze and lately sawdust is preferred to either. Instead of the stuffing various contrivances have been introduced through tubes bent or winding within the burner ; and last there is the 'Johnson burner' which checks by burners have wide orifices and in these lie their merit; for the stop-cock is the place to check the flow. the flow people do not know it and they. will not use it for that purpose. But U is my experience that thee:in:le effecteannot be produced by the stop-cock as we get by the-improved-burner. Professor Hedrick Although-yellow light is the most economical it is not the most available. Itsliability to smoke and its unsteadiness will unfit it for many people as we found in North Carolina where pine knots are much used. The subject of ' Gas-burning' will be resumed at the oext meeting. 4Ifter the close of the meeting the president remarked In reference to the subject of ' Expansion' (discussedct HOW TO MAKE IMPROVEMENTS. other than the master-mechanics of our railways. Of bor on another road but who wanted first to invent it will pay you for. its use.' Now this is doing the thing found; and he is the man who will save thousands of dollars to thecompany for which he works. But there is a class of men who come to the inventor or the im succeed not only in finding themselves bu
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