ofpounds of new copper.ELECTRICAL SCIENCE. Intensity and Consumption of Different Sources of Light. THE following are results of careful measurements the unit being a standard English candle. The tables are summarized. Petroleum Nike Air Max 90 Lamps.A number of different lamps were used. The general result wascurrent used at points of consumption. It consists of a compact electrodynamometer whose indications are proportional to the intensity of the current combined with a planimeter for integrating the deflections. The registeringapparatus is attached to a vertical wheel which turns by the friction of a horizontal wheel driven uniformly by clockwork which it touches. As the vertical wheel is nearer to or farther from the centre of the horizontal wheel its velocity of rotation is less or greater and its position is governed by the deflection Nike Shoes Australia of the dynamometer being nearer the centre for a small farther for a large deflection. The apparatus is compact and is said to measure to onehalf of one per cent: it can be used for both direct and alternating currents. In case the necessity of winding the clockwork were an objection it would be easy to accomplish this by a small motor that would be thrown in circuit when the spring was Coach Outlet Store Online uncoiled to a certain amount.THERADIOGRAPH. M. Louis Oliver proposes by an application of Crookes radiometers to measure the total amount of light falling upon the vanes the record having reference both to the time and intensity of the light. As the vanes of the radiometer revolve they make contact with a wheel closing an electric circuit. The wheel form of contact is adopted as it offers very little resistance to the motion of the vanes. The current closes a relay bringing into action a more powerful current which moves the needle of a stepbystep apparatus across a scale. If the instrument is constant in its action and fulfils the expectations of its inventor it may be useful for photometric purposes measuring the number of rotations in a given time.STORAGEBATTERIESONTHEBRUSSELSTRAMWAYS. There have been lately reports of the failure of the storagebatteries on the tramway in Brussels that is experimenting with them. It is said that the deterioration of the batteries has been as much as seven cents per carmile; and at that price they cost more than horses. The company supplying the batteries has come forward with the statement that since they delivered the cells they have never been consulted in any way and that their directions have not been complied with. It has been pointed out in this journal that while in many cases storagebatteries will today be cheaper than horses yet this will only be true when they are supplied at moderate cost and when the facilities and cost of renewal are reduced to a minimum. At the Nike Australia same time the cost of the batteries in Brussels is more encouraging than otherwise; for at seven cents per carmile for depreciation the cost will be only Coach Outlet Store Online slightly greater than that of horses and the increased speed and comfort will more than compensate for this. The total cost for horses may be roughly estimated at ten cents per carmile for an ordinary car in our Eastern cities. At seven cents for depreciation the cost of batteries will be something under eleven cents per carmile. With the advantages electricity offers even this should throw the balance in its favor; and the calculation is on the most unfavorable data obtainable.THEEICKEMEYERDYNAMO. This dynamo differs from the ordinary type in that the fieldmagnet coils are wound close around the armature with a heavy shell of iron outside. The object is to concentrate the Nike Air Max lines of force where they are most needed through the armatureand to prevent magnetic leakage. It makes a compact machine which should give considerable output for its weight. Christian Louboutin Outlet The Christian Louboutin Outlet principle of the ironclad dynamo such as is embodied in Mr. Eickemeyers Coach Outlet Store Online invention has been claimed by znumber of inventors. Whether Mr. Eickemeyer was the first to construct such a machine or not