view upon the screen. The apparatus works automatically, exactly matching the three images as they fall upon the screen, the large condensing lens when inserted in the socket bringing the parallel rays to a focus on the screen.

It is stated that for this new French process for projecting photographs in natural colors only a moderate light is required, a Welsbach gas burner giving a good image a yard or more in the diameter, while more powerful lights will produce large pictures most satisfactorily. An interesting feature of this apparatus, it is maintained, is that the problem of moving pictures in natural colors is possible with this new

REHEARSAL AT THE CHILDREN'S THEATRE. NEW YORK.

In the construction of the miniature playhouse on the roof of the Century Building, high above Central Park. there is realized one of William K. Vanderbilt's most prized projects. Mr. Vanderbilt furnished all the funds for the enterprise, and it is estimated that he spent $60.000. The theatre accommodates 900 children. It was opened during the Christmas holidays.

the oranges contains an incandescent bulb and a flasher causes them to alternately glow and darken.

So perfectly is this artificial tree formed that it cannot be distinguished from a growing tree by day.

REMARKABLE WRECK IN THE RIVER CLYDE, SCOTLAND. The tug Defiance was washed up on the river banks in this extraordinary fashion by a combination of wind and tide.

GERMAN LOTTERY SYSTEM

AGERMAN method of raising revenue

for various purposes is the lottery, which among that people is very popular. No moral stigma is attached to this sort of speculation in Germany. This photograph was taken on the day set for the first drawing in the PrussianSouth German Lottery. All the duplicate numbers of the tickets are encased in small, brass tubes which are then placed in the revolving wheel on the left. The tickets are divided into various classes or grades, depending upon the amount of the "capital" or prize. On the right, in the octagon wheel, are the dupli

COUNTING THE NATION'S CASH.

In order to verify the accounts of retiring U. S. Treas urer McClung, all the cash and bonds in the Treasury had to be counted before the new treasurer, Carmi Thompson. could assume full responsibility. This photograph shows the counters at work in one of the compartments, each of which hold about $10.000.000 in coin. Each one of the bags shown in the picture contains $1.000 in silver and weighs about sixty pounds.

COPYRIGHT, G. V. BUCK. WASHINGTON, D. C.

To Do AWAY WITH ONE POSTAL TROUBLE. An automatic stamp-vending machine, from which stamps of various denominations may be secured by dropping a coin of suitable size into one of the slots, according to the number and value of the stamps required.

cate numbers of all the tickets which have been issued, about 45 per cent of which are usually sold. The photograph shows one of the directors of the lottery placing duplicate numbers of the tickets which have been sold into the drawing wheel

LECTROLYSIS eats away the pipe that carries the water you drink; destroys the gas main that supplies your cook stove;

impairs the steel skeleton of the

skyscraper where you work; creates a tremendous waste in the industrial field today.

This ruinous agent, working silently and unseen, exacts from every large city, from almost every public utility corporation, and from the modern steel structure, an annual toll of millions of dollars. But its ravages have become known and preventive measures are being taken to stay the destroyer.

Electrolysis, stripped of all technicality, is the eating away of subsurface pipes, wiring and structural steel framework by stray electric currents.

Nearly every large city in America and in Europe is now warring against this sneaking force. For the last decade large public utility corporations have maintained corps of electrical engineers to study and overcome electrolysis. Large sums of money have been expended in this investigation work, but not until recently has a practicable remedy for application in this country been discovered. European countries, especially England and Germany, have partially

solved the problem under their local conditions during the last ten years.

Traction companies are the chief electrolytic offenders, although it has been demonstrated that corporations manufacturing electricity for heat and power purposes are also guilty, but in an infinitely lesser degree. Therefore, the electric street railway companies are the storm centers in the battle against electrolysis.

When electric currents leave the motors of a street car and reach the rail surfaces, they then return to their source of supply the power house-by paths of least resistance. This is a general law of electricity. The method now used almost universally for returning these spent currents is through the rails and copper cables. The cables are connected with the rails at short intervals and form

in the water mains, gas mains, cable sheaths and other metallic structure work within the electrical feeding areas. Through them the electricity flows back toward the power house. When the energy reaches points where the positive condition of electric pressure overcomes the resistance to the main return circuit, the electric currents flow back to the regular return circuit through cross sections of the earth.

No damage is done to the pipes or cables when the electricity flows into them, but when it leaves them the current disintegrates and destroys the metal in direct proportion to the quantity of current flowing from the metallic structures. Gas pipes and water mains slowly crumble under this action. Electric currents do not distribute them

selves equally in pipes that vary in consistency. For that reason, disintegration occurs soonest at the heavily charged spots, and, many times, pipes are perforated before they are wholly destroyed. Excessive heat often accompanies the process. instances are stated to have occurred where straps of iron conducting these currents from elevated railroad structures have been heated red hot and adjoining buildings set on fire in this man

Chicago has suffered more from electrolysis, perhaps, than any other American city. During the last two years a sweeping investigation has been made by electrical experts under the direction of the commissioner of public works. The damage discovered was almost incredible. City water mains had been damaged and destroyed by electrolytic action until they were unfit for

use. Underground leakage of water

amounted to more than 130,000,000 gallons daily in 1910-more than twenty-five per cent of all the water pumped by the city. Investigators estimated that 65,000,000 gallons of this leakage was the result of electrolytic damage. At three cents a thousand gallons for pumping, the direct loss to the city, traceable to electrolysis, was $1,950 daily or nearly three quar

The Chicago ordinance applies to all uninsulated, electric return-current systems. A return conductor system that will protect all metallic work from electrolysis is required. This means that the spent energy will be sent back to its origin in regular channels, thus materially reducing the troublesome stray currents. Daily recording charts are required in power stations to register the actual voltage conditions, thereby showing city authorities. whether each power substation is complying with the ordinance. This is a means of regulation necessary for the enforcement of the measure.

ters of a million dollars for the year. Chicago now seeks a cure for electrolysis. Legislation designed to remedy the evil was enacted by the city council on July 15, 1912. Nine months was granted the street railway companies in which to comply with the ordinance. The measure was passed after a long and bitter struggle with the traction interests. The fight was won for the city by Ray Palmer, city electrician, who had been appointed to that position after he had conducted the investigation which disclosed the great electrolytic damage. Mr. Palmer had previously studied electrolysis in Europe for three years while he was the employe of a public-utility corporation.