Ericsson's Newest Engine

Ani'd thf pondtr.ius machincry on t,h tliird flóor of the l'elaiuater Iron Works, in Baat Thirteenth street, New York, tberí stands a modest little entine designrd bj üapt. John Kricssou. Although it has no boiler, and is without valves of any kind, il was Dumping a column of' water intoa tub. At llu.' lirrit glauco it ia almoNt inipo-sihlt to discover wherc the power origínate that movea the part?. A close inepectioii, liow over, discovers that tflrco gas jets burn under a closed cylinder. This heats the air within the cylindor, which expanda and fnrecs a piston up tlironh the eylinler head. 'I'he air is cooled in the upper part of the cylinder hy moans of wh:I( is callad ¦ water jacket, and iits consequent contruot ion brinf,rs toe piitoo hack agahi. U 'ith (ho ifauge udieatiug a prosuute of twenty pbnnas to the s(uare inch tlii.i little entine puuiped 2U1J gallon of' water forty-sii feet an hour. One of tho peculiarities of thi.n enpine in that it requires no altention. It will run noiselessly day and niht, without variation in power, by ineans of ihret' ordinary gas jetH, or fifieen onSie feet [er hour. This beinp the case, the cost per hour fbr such au engine nscil for pumpinfr Crotón to the top of a high building in New York would be about three cents, reckoning gas at $2 per thousand cubic feet. The name air is heatcd over and over again. The intensity of the heat within the cylinder s only about 400 degrees Pabrenheit, and Huffieient power to burst the cylinder head it is said could not be generated within the eylinder. It is said that this engine can be ued succésslully against a head of 150 feet of water. It occupies a space upon tho flooroi'thirty-ninc by twenty inche., and is Ibrty eight ïnches high. lts running is noiselesH. This engine was constructed by Capt. Ericsson on the theory of his first calorie engine. Many years ago, believing tbat he could propel a hip by means of the application of the sanie principie, he builtaship. and fitted it with engines similarly constructed. But while the venture proved a seientiöc tuceoss, it was not so f'rom a comuiercial point, as the speed attained was ' Ufc. .j , ...J tu. ;j., ¦ j'„. ..., Hhips were concerned, was abandoued. Six sniall engines of' thodescription of that exhibited ye.sterday were built by the Delamatcrs, at Kricsson's instigation, sev eral ycars ago, and several of them, it is taid, are alill in use in various parta of the country. Eric-sin, however, wasso anxious to perfect his solar engine that he did not patent the design until now.