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in driving across country from Chicago a plant of that size under the old régime. to Portland, Maine.

The company will probably place these Just how popular the house-auto will mechanical pickers in all its other plants. become is a problem for the future. It would seem, however, that tourists who are familiar with the accommodations offered by country hotels might easily prefer to live as well as travel in their automobiles. At any rate, Mr. Washington has added another to the long list of "firsts," won by his distinguished ancestor.

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Running a Railroad

by Balloon RUNNING up the side of a mountain,

near Salzburg, Germany, is the most unique railroad in the world. A single steel rail has been laid from the base to the top of the mountain, and over it runs a sliding steel shoe. Between this shoe and a big hydrogen gas balloon, which floats about forty feet

A GROUP OF Breaker Boys EMPLOYED IN PENNSYLVANIA

COLLIERIES. There are scme 24,000 of them now at work picking

slate from the coal.

As might be expected each car is constructed very solidly to withstand the strain caused by the continual impact, the steel framework alone weighing fourteen tons. Each car is also provided with motors of sixty horse power, which are sufficient to drive the car, which makes the leap, up the incline.

Cars Collide for Fun THE latest thing in the freak amuse

ment line for summer resorts is known as the Leap Frog Railway. Its name describes exactly what this remarkable railway does. Two electric cars, each carrying 32 to 40 comfortablyseated passengers, meet in a head-on collision, while traveling along a single track. Instead of a smash-up, with its consequent horror of torn and mangled human beings, that would ordinarily ensue, one of these cars easily and gracefully glides up a set of curved rails with which the roof of the other car is provided, passes over it and slides down to the track beyond.

The Leap Frog Railway is located in Dreamland Park, Coney Island, on a pier running out into the ocean for 500 feet. The track is just long enough to allow the cars to develop a speed of about

To Trap Automobilists THE zealous sheriffs of suburban 1 towns now have a friend which gives them legal evidence for use against speed

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LEAP FROG RAILWAY AT CONEY ISLAND.

eight miles an hour, and as one is started at one end and a second at the other, they are calculated to meet at the center of

ing motorists. This able assistant is in the form of a time-recording camera. The shutters will give an exposure of one

however, instead of smashing together, one jumps over the other, for each is provided with a little railroad in itself. This is known as an overswitch or super-imposed track. The overswitch is provided with what are called pilot rails, which have an adjustable connection with the railway on which the car moves. They are so arranged that at the moment of collision the wheels of the car which is to mount the other, pass from the main track upon the overswitch and it passes above without even a jar.

time that a photograph is taken of the flying automobile and its occupants, a picture is made of the face of a watch, thus giving a record of the exact time the photo was made. In the use of this arrangement a trap is measured out and officers placed at each end with these cameras. The photographs of the car and its driver, with indisputable proof of the time in which he made the measured distance, may then be produced in court as competent evidence against the chauffeur,

Gold Coin and Bullion
THE mass of metal by the side of the

pile of coin is a bar of Alaska gold. The pile of coin consists of American $10 gold pieces. Here is an interesting problem for the mathematician to solve: How many of these coins could be made from the gold bar? This problem is not as hard to solve as it seems, for the pile of coins reaches to just one-quarter of

Messages to Trains AN ingenious device for delivering a messages to moving trains has been adopted by the Baltimore & Ohio Ry. It consists of a long forked stick, with clips at the ends; a cord loop is hung on these fingers which grasp it so tightly that a gale of wind cannot blow it off, but the trainman may slip it off with ease. To this cord is attached the messages. The stick is held out to the train with the fork pointing in the way the train is going. The trainman simply holds out his arm and allows his hand to come between the forks of the stick and the string. The cord is loosened immediately and he carries it with the message attached away with him on the speeding train.

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To Protect Chauffeurs

NEW speedometer for motorists is

now on the market, which not only gives the rate of speed per hour and the number of minutes to the mile, but can be set at any given speed, so that when that speed is exceeded a buzzer announces the fact to the driver. With this device in use, a chauffeur can set the speedometer at the limit of speed allowed in the country where he is traveling, and, as soon as the limit is exceeded, he will be warned of the fact.

To Measure Tiny Space
AN apparatus for measuring the sev-

enty-millionth part of an inch has been made by Dr. P. Shaw, of Nottingham University, England. It works upon

the principle of electric touch, and conALASKAN GOLD BRICK.

sists of a fine micrometer screw and six

levers. The apparatus is so sensitive and the height of the bar. Consequently 100 delicate that it is impossible to manipuof the $10 pieces would equal its length, late it before an audience. It is hung by and 200 of them would make two piles of rubber bands, covered with thick felt, and the same height. As the thickness of the must be worked at dead of night, when bar is but a little more than the diameter there is no traffic or factory working. of the coin, but a small amount of gold The smallest distance that this mechanism would be left over after melting the bar measures is about the distance between a into 200 coins. As a matter of fact the solid and a liquid molecule. Dr. Shaw's bar weighs just 108 ounces. As an invention was first made in 1900, but its American $10 gold piece weighs 258 great improvement of late has made it the grains, a bar of this size is equal to about wonder of physicists throughout the 201 gold pieces worth a little over $2,000. world.

Steel Conveyor Belt PROBABLY the longest steel conveyor

belt ever made is that shown in the accompanying cut. It is 97 feet long, 24 inches wide, and one-half. inch thick,

arating the two lakes, so that the whole journey is like a trip up and down an inclined railway. The diminutive train is made up of a little engine—"just the size of two plug hats," it has been described—a home-made baggage car, and one of the old Toronto street-cars for a passenger car.

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Collapsing Fire Escape
A NEW YORK inventor has recently

patented an ingenious fire escape, which is illustrated herewith. It consists

of a hollow tube made of strips of an STEEL BELT-CONVEYOR IN PROCESS OF CONSTRUCTION.

incombustible material. This collapses

when not in use so as to take up very and was made for a mining company of little room, but when in use it will hang Victor, Colorado, to be used instead of a from a window like an ordinary rope and less durable rubber belt in conveying ore will stretch out under the weight of the from one point to another. The ma- person using it. The surface is rough terial used was strands of old flat hoist- enough to allow a good grid and the ing rope. The belt is spliced endless, pressure of the hands on the escape forms the splice going clear round the belt. a kind of shoulder so that the hands In the cut, one portion is shown finished, cannot slip. As it is hollow, a circulation another part half-finished, while in the remainder the strands are still hanging

- WWW loose.—E. J. CROCKER.

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Killed by Black Fish scopical examination, undergoes some

sort of union with the fibrous substance, THE bay of Santa Catalina, on the as no traces of sugar crystals are found 1 coast of California, is noted not only after the process is completed. The for the number, but the size, of the wood is then withdrawn from the boiler, whales which frequent it. There are and dried in an oven, which is regulated times when schools of fifty or more can to different degrees of temperature, debe plainly seen from the land sporting in pending upon the nature of the material its waters They are attacked at times submitted to treatment. It is claimed by what are known as the whale killer, that wood thus treated is no longer pora large black fish, which has a bony saw ous, can be worked without shrinking or attached to the snout. When a fight cracking, and is permanently protected occurs between a black fish and the against decay.

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whale, the latter defends itself by striking its smaller adversary with its flukes, sametimes killing it. Usually however the whale is the victim. The one shown in the illustration died as the result of wounds made by the black fish and floated into shallow water where it was fastened to ropes and pulled upon the beach with horses, to be cut up for the blubber and bone which it contained.

Concrete Pipe Line

CONCRETE aqueduct recently

completed at Cambridge, Mass., affords a remarkable example of the growing tendency to replace iron, brick, clay tile, and other materials of construction in the building of waterways with concrete, and thereby to secure permanency. The new conduit, which is said to be the first of its kind in this country, is 21, miles long and 6 feet in diameter, and is designed to sustain any pressure. It replaces an old iron pipe line.

In this connection it may be interesting to note that the Syracuse (New York) University contemplates establishing a complete course upon cementing and concrete construction, for which a new building is now being erected, to be devoted exclusively to this branch of instruction.

Preserving Wood With

Sugar
THE latest method of preserving wood

is to treat it with a solution of sugar. The material to be treated is put into a cage, and the latter plunged into a boiler, which is then closed, and a solution of beet sugar introduced. The liquid penetrates the pores of the wood, and, as would appear from the results of micro

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