The American journal of science and arts . whichthey are seen. One of the wires is soldered to the socket,the other is fastened by means of a collar of leathers, packedby a screw, so that it has no metallic communication with theQther wire, unless through the filament of platina, by whichthey are visibly connected above, and which I have alreadycalled the igniting wire. The glass has a capillary orifice atthe apex (A), which by means of a lever and spring (appa-rent in the drawing) is closed, unless when the pressure ofthe spring is counteracted by one of the fingers of the ope-rator. The slid
The American journal of science and arts . whichthey are seen. One of the wires is soldered to the socket,the other is fastened by means of a collar of leathers, packedby a screw, so that it has no metallic communication with theQther wire, unless through the filament of platina, by whichthey are visibly connected above, and which I have alreadycalled the igniting wire. The glass has a capillary orifice atthe apex (A), which by means of a lever and spring (appa-rent in the drawing) is closed, unless when the pressure ofthe spring is counteracted by one of the fingers of the ope-rator. The sliding rod (seen at R) is accurately graduatedto about 320 degrees. So easy is it to manipulate with this instrument, that anynumber of experiments may be performed in as many min-utes. The ignition of the platina wire, is caused by either offour calorimotors, each consisting of four plates of zinc, andof five of copper. They are all suspended to ©ne beam, dfernay be s«;en in fig. ,2. fgllowing. Sfr. Hares Improved Kudioiniiexs,Fig. 2. ^9. Two furrows are made in the wood of the beam, one oneach side. These are filled by pouring into them meltedsolder, after having caused a metallic communication betweenone furrow and all the copper surfaces of all the four calori-motors; also between all their zinc surfaces and the other fur-row. The acid for exciting the plates is contained in the jugbelow, which may be so uplifted as to surround with acideither of the calorimotors. Hence, while one is in operation,ihe others are by repose, recovering their igniting power.
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