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Show NOTES ON SCIENCE diseases diphtheria, bronchitis, typhoid, ty-phoid, cholera infantum and the like. The main causes are a perfected hygiene hy-giene of towrs and the progress of medicine. Pneumonia, however, claimed 192 victims per 10,000 in 1900 to 187 in 1890. Tower Transmitter. In the illustration is shown the power-transmitting device recently, designed de-signed by Charles G. Armstrong of Chicago, 111., the object of the invention inven-tion being to drive machinery by employing em-ploying magnetic lines of force. The inventor states that he is enabled to transmit the rotary motion of a driving driv-ing wheel to a driven wheel without actual contact and without with-out any mechanical wear and tear With some refreshing exceptions, popular science continues to be more popular than scientific. For instance, here is a late bit of gossip about dynamo dyna-mo design: "It will be news to many that dynamos have gone out of fashion. fash-ion. Those who belong to the smart set of the electrical world talk now of generators. Generators that is to say, our old friends the dynamos have ceased to be specially interesting be- cause, like the fiddle, they have reached perfection. To those who have not paid attention to the matter this may sound , like an exaggeration, but, as a matter of fact, there is not much room now for improvement in electrical machinery. ma-chinery. Everything is becoming fixed and standardized a sure sign of maturity. ma-turity. The imitations and conditions are well understood, and only a few more- revolutions are possible, and none probable." This is from a handsomely illustrated illustra-ted and printed article in one of the ten-cent monthlies. One can detect a certain disguised flavor of truth in this glib recital, although the statement that "only a few more revolutions are possible, and none probable," is puzzling; puz-zling; but, after all, how misleading the whole is! Generators have hardly reached perfection, and standardization of apparatus does not mean stagnation by any means. Watch-Winding Indicator. The object of the invention illustrated illustra-ted below is to indicate at a glance when it is time to wind a watch or clock, without the necessity of testing It, and also to insure regularity in winding. Jewelers say that a watch must be wound at regular intervals to keep the best time, but it is seldom that the owner attends to the winding at the proper tims, simply because there is nothing to call his attention to the fact that the watch should be 'wound. The Indicator here seen consists of a Drives Without Contact. or noise resulting while the machinery is in motion. The driving wheel is provided with magnetic coils arranged around the periphery, with means fTr energizing a portion of the coils at a time. This is accomplished by passing tha electric current from a generator through the upper spring contact arm into the two or three coils immediately immediate-ly below, and allowing it to pass out through the lower arm. In this way a strong pull is exerted on the project- ing spokes of the larger wheel on the side toward the energized coils, with absolutely no attraction after the center cen-ter is passed. The tendency is for the magnets and attracted spokes to continually con-tinually approach each other, and as fresh magnets and spokes are constantly con-stantly coming under the drawing power the wheel continues to revolve as long as the energizing current is sunnlied. - Rapid Tumbler Washer. The necessity for a rapid and thorough thor-ough tumbler cleaning apparatus for restaurants, soda fountains and other public drinking places is apparent. Orlando P. Mason of Bellaire, 0., has patented a machine for this work Reminder of JDnty. circular plate of metal, mounted loosely loose-ly on the shaft which carries the hands. A slot is cut in the dial and the figures fig-ures on the indicator are arranged to present themselves in the opening as the plate revolves, the actuating mechanism mech-anism being the spring which runs the hands of the clock. While a glance at the dial will show the number of hours which have elapsed since the watch or clock was last wound, the device Is which seems to be simple and easily operated, also permitting rapid use. A reservoir of water" is provided with automatic, feed and . drain pipes to maintain the water at the proper level. Inside this reservoir one or more vertical ver-tical tubes are secured by foot brackets brack-ets as shown. Inside each tube is a coiled spring, which forces upward a screw-threaded spindle turning In a collar at the top of the tube. Each spindle bears a brush shaped to fit the Inside of the sj-" if "isS! Q arranged to particularly attract attention atten-tion as it nears the winding hour, three .- or four of the highest numbers on the Indicator being in red or some other prominent color. The inventor is John A. Saunders of Poindexter, Va. Mortality In Dnltcd Stntos, A recent bulletin of the United States census compares the mortality of 1S90 and that of 1900 and shows that there has been a diminution " of something like 10 per cent in the death rate. In 1890 the average longevity In the United States was 31.1 years; in 1900 it is 35.2 years. The increase Is 13 per cent. This is the conclusion, at least, so far as cities of over 8,000 Inhabitants are concerned and It represents rep-resents the facts for the whole country coun-try approximately. In 1894 245 persons per-sons died of consumption in every 10,-000; 10,-000; In 1900 only 190. The case Is similar, sim-ilar, though not so marked, for other For Soda Fountain. tumblers. As the glass is pressed over this brush the spindle Is forced downward down-ward through the collar, revolving as it falls, while the glass Is held firmly in the hand to prevent revolution. As the brush is saturated with water and whirls only a few insertions are required re-quired to clean the tumbler" thor-' oughly. |