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Show i J( POPULAR I 1 SCIENCE An English Carpet Cleaner. Tears ago the. housekeeper was con-teat con-teat to sweep the carpet with a broom, but with the Invention of the carpet Jweeper It was dicovered that handling hand-ling the broom was unhealthy, both for the woman who wielded It and for the unluckyndivlduat who happened to be wrctiln reach when hor Iro was areased. Boon It was found that the , handlo of the rarpot Bweeper could be tinscrowed, and so man In his despair las cast about for another device Electricity Rotates the Brushes, which would clean the enrpots without with-out endangering his health. Honco the electric Bweeper. This machine comes from England, and seems to bo os-BpL os-BpL pec lolly designed for use In largo halls and public rooms having such great "floor spaco as to make cleaning them even with tho hand operated sweepers a laborious task. In this apparatus a small motor Is mounted on tho frame, with belting connecting tho shafting with two rotary brushes, -which are rapidly revolved as the sweoper Is drawn over tho floor. To -effectually prevent the spread of dust n auxiliary frame surrounds the body -of tho sweeper at Its lower edgo, with a. flexlblo edgo piece bearing against the carpet on all sides. The inventor of this apparatus Is Frank J. Farrcll, of London, England. A Wonderful Rule. H. M. Jones, an architect of, this tity, has produced a remarkable in-Tentlon in-Tentlon In the shape of a mechanic's .pocket measuring rule, on which he lias been studying for several years. lie haa taken a cheap, common rule, ud, without Increasing or diminishing lta original size, weight, appearance or original usefulness or convenience, has produced a rule that will glvo the length and levels of the ends of all kinds of braces or rafters. It will square oft a board or square and lay out a cellar, mako an octagon or square mitre. It will tell tho height of any building or elevation, the depth of any valley or chasm, tho width of oy street or stream, or both. An-hor An-hor a boat In the mlddlo of a river, and the rulo will tell how far it is from the shore; a roofer can tell the intensions of any roof while standing the ground; it will measure any-thine any-thine in flight, whether In reach or mot; it will give the length of any straight or slanting line, it solves all the problems In gcomotry and trigonometry trigon-ometry tho mechanic is ever called upon to solve. The Improvement can be attached to nil kinds of rules In use, whether of the French or English systems, and to a new rule while f making. One cent per rule will pay the cost of the Improvements; to a rule already made It will cost two cento a rulo. Meridian Journal. A New Percolating Coffee Pot. Willie the coffeo pot which makes tho bovorago by percolating hot water through the finely ground colTec Is finding grent favor, thero Is somo complaint com-plaint that one Infusion docs not mako tho drink strong onough. necessitating the pouring of tho cotTeo from tho pot and passlug it again through the Pumps Water Over the Ground Coffee, grounds. Tho occompany illustration shows a coffeo pot recently designed by a Massachusetts inventor, with the idea of removing the nccosslty for yourlng tho liquid from tho pot preparatory pre-paratory to passing It through the porcolator tho second time. Instead of pouring the hot wator directly on the ground coffee In tho porcolator, tho bottom portion of the pot Is filled with tho required quantity of wnlor previous to Inserting tho percolator. In the center of the latter and extending extend-ing down to tho bottom of tho pot will bo seen a cylinder containing a piston, and by raining nnd lowering this piston tho water Is pumper' from the pot to the top of tho cyllndor, falling fall-ing thenco on tho coffoo nnd percolating perco-lating through Into tho lower chamber again. When tho liquid has gained the deslrod strength tho porcolator and pump can be romovod and tho - cloar coffoo Is then rendy for serving. Pressure Test of Small Tubes. An oxporlmont tried by an English K naval engineer to test tho strength of H tho small tubes In water tubo boilers H showed that they resisted tho pressure far beyond, any that they could be subjected sub-jected to in actual use. A copper tubo of ono inch outside diameter was plugged plug-ged on both ends awi a gauge fastened on. It was aetwa blacksmith's forge and steam r38tli ;ih000 pounds per;squaro Inch, -w0f Wcllsvlrst. This tube 'was 0.07 lncJine time aP tensllo strength, of the r bnly six and a half tons J?ht A steel, .ube of ontllanlball fruiHjes diameter colled thtfJJJtf,?,. " Valx Inches dlametej y per ' r0'r ' hick stood 4788 pou ) anrt JXUaW tfoff b'o-foro b'o-foro bursting Through defects In the material they sometimes give way nt 30d pounds per square Inch. Iron Ago. New Safety Lamp. At n recent meeting of the Academy of Sciences of Vienna, Prof. Mollsch of Praguo communicated n paper upon phosphorescent bacteria. Ho has been ablo to photograph tho colonies of a phosproresceiu micrococcus by means of Its own light. Dy Inoculating largo glass ilnsks of half-litre capacity containing con-taining a suitable culture medium with tho organisms, a "bacterial lamp" Is obtalnod with which It is quite possible pos-sible for an observer at a distance of ono or two metres to read a thor-momctor thor-momctor or to see the time of a watch. On n dark night tho "bacterial Inmp" Is vlslblo at a distance of more than sixty paces. Improved Stock Waterer. No matter how pure a source of supply sup-ply may bo at hand for watering stock, if It Is pumped Into an open trough and left exposed for any length of time it soon becomes polluted and unfit un-fit for tho animals to drink. This will not bo the case, acccording to tho Inventor, if tho stock watering apparatus ap-paratus hero shown Is put Into use. If pure wator Is furnished to tho tank or barrel to which this fountain Is attached, it Is claimed that there Is no way by which tho animal that Is drinking can mako it foul. The waterer consists of a double drinking Animals Cannot Befoul the Supply, bowl, made of cast Iron, which Is attached at-tached to tho outside of a tank or barrel. On tho inside Is another chamber, cham-ber, Inclosed In which Is a brass float and lever, controlling tho flow of water to tho outside bowl. The fountain Is automatic in Its action, as the float rises with tho water in the bowl and cuts off the supply when the proper height has been reached. As the valvo Is always closed, except when water Is flowing from the tank to the drinking drink-ing bowl, there is no opportunity for foreign matter to And Its way to tho Interior of tho storage reservoir. Locomotive Fuel. Inventions, now uses nnd adaptations are the results of tho wants nnd necessities neces-sities of thq time. The adoption of fuel oil on the locomotives employed on tho railroads traversing tho Intorlor valloys of some sections of tho West has removed one of the chief sources of dangor from flro In tho ripening grain fields. Locomotives using It do not omit any sparks or oject red-hot cinders to lgnlto the withered grass along tho right of way or tho parched grain In tho neighboring fields. Henceforth Hence-forth grain field fires will probably pass out of the future history of tho wheat-growing valleys; the railroad claim agent's occupation will practically practi-cally disappear, a big leak In tho corporation's cor-poration's treasury will drop to correspond corre-spond with tho diminished risk tho use of fuel oil on locomotives has caused. Wo bellevo that fuel oils Is destined to play no small part in tho economics of the future. Epworth Herald. Waste Available for Fuel. Commissioner John McGaw Woodbury, Wood-bury, of tho Street Cleaning Department, Depart-ment, Now York City, has received the reports of experts as to tho experiments experi-ments mado in the use of street and store sweepings as fuel. He has calculated cal-culated that there would be 800,000 cublo yards a year which could be utilized by tho new process In the making of briquettes for fuel. With this fuel it was estimated that power enough to light 7,272 lamps of 2,000 cuudlo power each for a year could be obtained. Commissioner Woodbury will soil tho fuol, nnd It is announced that some arrangement for tho uso of machinery of the city to generate and soil power for tho pumping stations ol the wator supply department in the borough of Manhattan might be made. Weather Signals In India. Monsoon stations are to be established estab-lished In India for tho purpose of taking tak-ing observations by means of kites nnd klto balloons. Tho first station will be In the Himalayas at Simla, 7,000 feet above the lovol of tho sea. |