Les modalités pratiques d'un traité global sur galvanoplaste dont la galvanoplastie, avec notes sur d'anciens et modernes de la dorure, et des formules pour de nouvelles solutions . wer que d'autres, et parce qu'un runningdynamo lente est beaucoup plus calme, plus durables, et aussi plus facile de soins en inscrivant. Le fonctionnement silencieux est aidé par le solide-lité de la base, qui est de la fonte d'une seule pièce, formingalso le joug du champ des aimants. Theheaviest ce casting est partie de la machine, et apporte donc le centre de gravité très bas, assurant ainsi la stabilité et la stabilité.La proximité de l'armature de base le domaine magnetsrende

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The practical electroplater A comprehensive treatise on electroplating, with notes on ancient and modern gilding, and formulas for new solutions . wer than others, and because a slow runningdynamo is much quieter, more durable, and also easier totake care of. The noiseless running is aided by the solid-ity of the base, which is of cast iron in one piece, formingalso the yoke of the field magnets. This casting is theheaviest part of the machine, and therefore brings the centreof gravity very low, thus securing steadiness and stability.The proximity of the armature core to the field magnetsrenders a high magnetic pressure unnecessary, and theamount of magnetism escaping from the fields is thereby BRUNORS PERFECTED DYNAMO. 17 very much reduced, so that no perceptible effect is producedat a short distance from the motor. The best double insulated wire is used throughout forthe windings, the cores being first wrapped with vulcabestonand heavy canvas saturated with shellac, and the machinesare severely tested for insulation, none being passed withoutan insulation resistance of over one megohm, and the aver-age is at least ten megohms.. Detail of Self-Oiling Bearing. The output given by the machine in volts and amperes, its speed, consecutive number, &c, are all plainly markedupon the name plate. The constants of the armature, the number of turns, size of wire, &c, are also stamped uponits face plate, which is a new feature. The rocker arm is provided with a heavy insulatedhandle to enable all adjustments to be made without touch-ing the conducting parts, and the machine is heavilyjapanned in all its parts and baked at a high temperature, thus securing a polished surface which resists dirt and oil. i8 the practical electroplater.Carbon Battery. The accompanying illustration shows how cells areconnected, that is, in series or intensity, to get the highestvoltage possible from the battery. However, this will notsuit plating, as it is better to connect the cells in quantity,

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