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makes the sufferer feel "sick all over". Often the micrococcus catarrhalis is found in "pure culture" in the nasal passages of persons suffering from colds, having bred at such a rate as practically to shut out all other species.

Colds are due to the habit of living indoors, where the germs breed. People who live and work in badly ventilated rooms suffer constantly from colds. The best preventive is plenty of fresh air. Unfortunately, most people are afraid of fresh air, holding an utterly mistaken belief to the effect that it causes colds. This extraordinary notion has much to do with the prevalence of the "indoor plague", as coryza has come to be called.

The microbe of grippeknown to science as the bacillus influenzae -is with us all the time, and kills a good many people every year. Once in a while this highly infectious germ disease appears in a malignant form in Central Asia, journey

the United States. For some unexplained reason, all the great epidemic maladies seem to originate in Asia, and thence travel westward by way of Russia.

Physicians nowadays urge that any case of "bad cold" or "running at the nose", ought to be immediately isolated, just as if it were measles or scarlet fever. It is dangerous. It is dangerous. Colds are exceedingly infectious-which, of course, is the reason why they have such a way of running through families-and it is important to disinfect all handkerchiefs, nasal discharges, or sputum, as would be done in diphtheria. Furthermore, the patient should have plenty of fresh air.

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If, as often happens, there be a tendency to recurrent colds, the

treatment by

vaccination is

recommended

-though in some instances it is less effective than in others, for the reason that some of the germs causing the mischief are not of the same species as the killed ones contained in the bacterin administered. This difficulty will be overcome eventually-at all events, for` patients who can afford to pay for the luxuryby having the bacterin prepared directly from the microbes which are found to be afflicting the individual sufferer.

DRAWING OFF FLUID PREPARATION OF KILLED "COLD" GERMS INTO GLASS TUBES

at a

ing toward the setting sun regular rate of twenty-odd miles a daythe ordinary speed of a caravan. Then, on reaching the longitude of railroads and express trains, it adopts a suddenly accelerated gait, and within a few weeks arrives upon our shores and spreads over

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THESE fish were captured, in depths

of from one to two thousand fathoms in the Atlantic, and brought to the surface by means of a trawl. To preserve the extraordinary shapes of these strange dwellers of the ocean floor, a corps of artists quickly made casts of their bodies and copied the colors. The majority of those living at great depths were jet black. Their luminous organs, which light up the dark regions which they inhabit, are marvelous. These fish plow through the dark waters like flaming torches. Some have elongated

snouts, on the tips of which are luminous organs emitting great volumes of light. Others have rows of luminous. cells on top and below their bodies, with reflectors and lenses which serve the function of projecting light in definite directions.

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TWO BODIES TO ONE

TRUCK

IN order to expedite the loading of motor trucks and the unloading of freight cars, a Los Angeles wholesale grocer has installed a very efficient system. It includes a fleet of motor trucks each of which is equipped with a spare body. These bodies are actually small trucks, furnished with wheels of their own so that they can be propelled by hand to any part of the big warehouse; but in order to convey them more speedily to the part of the building where they are required, an overhead electric system is used by which the load is picked up, by means of four steel hooks on each body.

While the spare body of a truck is thus being conveyed, loads for local retailers are made up. But, instead of having a motor truck stand idle at the door while these goods are being brought from various parts of the building, the loading is all done while the truck is delivering elsewhere; then as soon as it returns, the empty body is lifted from

the chassis, the loaded body is lifted into place, and the truck starts out again, after a delay of only five or ten minutes. Under the previous system, to load, costs an hour's time for the driver and the idleness of the high-priced truck.

Freight cars unloading at the warehouse are cared for in the same way. The truck is picked up by the telepher and swiftly carried to the proper storage quarters.

MOTORING TO SCHOOL

CARRYING a dozen or more children in a single load, a five-passenger car makes daily trips from the ranches near Brawley, California, to the city schools. The man, who has been engaged by the trustees of that district to carry the children to the source of wisdom, declares that the more children in the tonneau, the better they like it. He makes sixty miles a day with this crowd of young Americans, carrying twenty-five pupils in all.

Truly the way of education is made

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smooth in our day, for while grandfather was glad to trudge four or five miles to school through the snow or the rain, the younger generation is whisked over the roads in a motor car.

SHIPS OF CONCRETE

A500-TON concrete scow was recently launched at Baltimore, Maryland. It is 110 feet long, 28 feet wide, and has a depth of 10 feet 6 inches. Others, built

500-TON SCOW BUILT OF CONCRETE

before this one, have shown a large saving in repairs over wooden craft. It is claimed by the builders, that concrete vessels will ultimately create a revolution in ship construction.

The Italians have already made use of concrete vessels and have found them practicable, it is stated. Indeed, they seem to be of exceptionally stout build, for one of them, rammed by a small war cruiser, showed no other injury but a crack, that it was quite possible to repair successfully. This accidental test gave the constructor much satisfaction.

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ELECTRIC LIGHTS CALL POLICE

BY

ELECTRIC LIGHTS CALL POLICE

Y equipping the patrol boxes in Redlands, California, with red glass panes and installing an electric light inside the box, it is possible for the chief of police to summon patrolmen on the beat to the telephone. The light is switched on from the central station and, as an additional means of attracting attention, red lamps which hang over the street intersections are lighted. By this method the chief is able to notify his men. promptly of any crime committed in their vicinity, or to warn them to look out for fugitives, without waiting for the patrolman to call up the office in making their regular reports.

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T

THE 150.000-EGG HATCHERY AT PORT CONNOR. TEXAS The remarkable feature of this building is its smallness as contrasted with its capacity.

HERE is now in operation at Port O'Connor, Texas, a machine that is capable of turning out a chicken every twelve seconds for twenty-four hours a day, and for three hundred and sixtyfive days in a year. This mammoth hatchery is the third of its type built by the inventor, who was formerly a poultry expert for the Government. It is the second largest hatching establishment in the world, being slightly exceeded in capacity by a hatchery at Petaluma, California, which holds 165,000 eggs as against 150,000 in the Texas machine.

Perhaps the most remarkable feature of this plant is the fact that all the eggs together with room for candling, chick packing, and all engines, fans, and equipment, occupy but a single floor sixteen by fifty feet. Furnished with common incubators, such a room would have just about the same capacity in three weeks as this plant has in a single day.

This wonderful economy of space and cost is attained by placing the eggs in superimposed trays like the type cases in a printer's case rack, or the trays in a fruit dryer. This idea has been tried be

fore but was not a success on account of the hot air rising. In the present instance, this difficulty is overcome by forcing a continual current of air from a centrifugal fan through the hatching chamber, which serves to keep it at an even temperature throughout. While this is quite an item of expense and would not pay with a small machine, yet in a big plant it is paid for several times over by the saving of the duplication of the small machines, as well as by the economy of the fuel and labor.

One of the unique improvements in the Texas plant is a turning system, by which compartments holding 10,000 eggs are swung on a pivot and the eggs turned by inverting the entire compartment. This enables one man to turn 100,000 eggs in less than two minutes. These eggs are ventilated and maintained at an equal temperature by an eight hundred pound centrifugal fan, requiring four horsepower to operate it, and the temperature is regulated to a tenth of one degree, while water sprays regulate the moisture to a similar nicety.

The eggs are not cooled from the time they enter the hatchery until they leave,

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