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Show Making Uae of Radium. An Imtru nt lately devised by R. i. Htrutt make ingenluua uae of tho emanation of ruillum. An electro-cope electro-cope with dividing leavea la sealed up in a vacuum tube along with a perk of radium. The Inner aide of th vacuum tube are partially coated with tinfoil, which communicate by a wire fused In tho glnae wltb th "earth" outside. Thua, If th elec-troncofie elec-troncofie be charged wllh positive electricity. It leave, cipandlng, will touch the llufoll surface; will be discharged dis-charged and will fall together again. Hut the apark ot radium which la always al-ways dtacharglng negative lona through the glass walla of the vacuum vacu-um tub la. In consequenc. continually continu-ally creating and maintaining an at-monphere at-monphere of poaitlv electricity within tbe tube, ac therefor aa often aa the electroRcope la dla-rharged dla-rharged recharge It. Tbua th leavea of the electroscope ceaaeleasty eipand and fall together, again. Tb Instrument Instru-ment haa been variously called a radium clock aod a perpetual motor. Doth description are wanting In accuracy, ac-curacy, for there la reason to believe that Ihe Instrument will not go on working forever, but only during the 20.000 or Sn.OOO year of th radium' life: and there la no guarantee that It will go on working with chronological chrono-logical accuracy. HUM, It la th near-eat near-eat approach to perpetual motion that haa ever boon artificially attained. at-tained. Operated by Electricity. Doiihtlea tha man who first Invented Invent-ed tbe typewriter felt satisfied that he had attained tho numinlt of apeed In writing when ho had perfected hla machine to respond to the touch of Current Manipulate th Lever, th flngera on tho key. And with a few minor Improvement, which hav not changed tha principle of the Invention, In-vention, It baa flllod an Important place In the business world. It haa alwaya beon neceasary to depreaa th keya ufflclonlly to throw the type-bar against tha Inking ribbon and loava Ita Improaaton on th paper, thl ao tlon releasing a universal bar to allov the carriage to move forward on apace aa each loiter I printed. Now It la done by tbe aid of the electrlo current. Each rod proponed to do all thl work automatically which oper-atea oper-atea a type-bar, la now connected wltb a little electro-magnet and aa aoon aa tha current enter any coll ita corresponding corres-ponding rod la thrown forward Just far enough to book the lower end of It beneath be-neath tb edge of tha central disk as ahown. Juat aa thla connection la mada tb paasago ot th electrlo current cur-rent through another electro-magnet dopreaaea the disk, pulling th rod down and striking th typ face on tho paper aa though It were done by tha depression of a key with th Co. gnr. To form the connection between the Individual magncta and the operating oper-ating mecbanlam th writer wear a sot of motallic thimblea on the flngera, which are wired to the source of tha clot trio current. Tha Instant connection connec-tion la mads wltb one ot the metallic, plates on th keyboard th current passu through the plate Into tho corresponding cor-responding magnet and hence to the disk In the center ot the machine. William K. Roberta of Newark, N. J., la th Inventor. . A New Kind of Steel. Samuel Maxim, a brother of the Maxim ot rupld fire gun fame, haa mado a discovery In a process for producing steel which has remarkable remark-able qualltlea. Mr. Maxim Is a farmer farm-er who Uvea In Maluo. For aometlme ho haa been experimenting with various vari-ous method for making blade which will vis with the Damascus blada of Immortal famo. After reading aom old Hindoo book he constructed a forge on tbe Indian plan, and from thla produced an Ingot which he forged Into a rough drill. Thla drill bored an Iron file aa easily a If It had been a piece of wood. Tried with a acale of metals gradually Increasing In hardness, thla drill penetrated them all, not stopping at th beat it eel obtainable. In case thl ateel should prove to be Ilk that of th ancient It will open a vast Sold of possibilities. New Mllk-Drylng Machlnv. Tbe JusMIalntaker milk drying machine ma-chine la extremely almple. The cylinders cylin-ders are heated by atoatn to a surface temperature of about 230 degrees Fahrenheit. They are aeparated from each othor about one-eighth of an Inch and revolve Inversely, making about six revolutions a uiluutu. The milk to be dried la fed continuously upon tho revolving cyllndera and, passing between them, la spread In a thin, uniform layer upon tho eurfaca ot each cylinder. The milk aollds are then removed In continuous sheets, aa tho cyllndera rovolve, by stripping knives held In contact with tho cylinder. cylin-der. My 'nl" proceaa milk I reduced to dryness In lesa than thirty seconds. The sheets of dry milk are afterwards ptilverlxed by being passed through a lcve. |
