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An improved form of electric candle has been patented by Mr. S. Colmd of 65 Grace-church street, London, for which the following ~advantages are claimed:
Up to the present time all electric candles in use have been made from pure carbon or carbon mixed with other substances, such, for example, as kaolin or plaster of Paris, all which have the great disadvantage of burning too quickly away and producing, in a greater or lesser degree, a flickering light. Such candles therefi~re require controlliflg mechanism to regulate their distance from each other. M:r. Cohn6's invention consist~s in making or tbrmlng a candle of ultramarine or the substances which when united together form or produce ultramarine. The ultramarine may be green, blue or of any other color in which it is produced. It may be used either in it.s pure state or mixed with carbon, kaolin, pla.~ter of Paris, molasses, or with any metal reduced to powder so as to be in a finely divided state. The metal preferred is copper, and it is ultramarine, carbon, powdered copper and molasses that the patentee employs. To about four parts of earl)on he adds one part of ultramarine and one part of the finely divided metal and as much molasses as will when nfixed with the .other materials be sufficient to form the whole into a paste whieh can be mouhted or otherwise tbrmed into the shape desired. The candle rims tbrmed is dried and heated ibr a sufficient time by fire by whose action all the moisture is evaporated, the sulphur is burned away, and the molasses as well as all other organic matter becomes carbonized. The patentee does not confine himself to the exact proportions named above, and it will be understood that the mixture alluded to is only ~)ne of those in which the caudle may be made. When these eandle~s are put into use the resistance and the current in the arc are to a very great extent less varying, and controlling mechanism to regulate the distance is nearly unnecessary, because the candle is consumed very slowly in comparison to those heretotbre in use. Moreover, less con-:sumptlon of energy is required for the new candle, and therefore the divisibility of the electric light becomes e~sier. For eit~eting the latter purpose, Mr. Cohn6 bakes the candle in a zinc tube, whereby the zinc of the tube sublimates, and partly enters into the candle. By this means the conductibility is greatly increased ; thus very little consumption of energy takes place) and the problem of the divisibility of the electric light approaches solution.~Euglish Mechanic.
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