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Show i POPULAR 3CIENCE - 1 Automatic Trap for Kodents I In the majority of trap for cat. 'hlr rats and mice no provision la made fur disposing of the rodents, and If a s: '-4 'cj'"; caKjvaQ I '-mrZjX uprliig trap la uaed (here la tho disagreeable dis-agreeable Inek of releasing the dead animal by hand, which nalurully la Removes Chill from a. R.oom I In BPlto of the fact Hint at this sea-iud sea-iud of the yenr the major port Inn of lh country I. undergoing what senma to the rcaldenla llko tropical hint, there are many localltlna wliero the nlghla arn annielei.tly cold tn warrant the biillillng ur a fire In the grain In rooina which aro provided with Ihem. A thnap grati a and Are places are nnt as rummnn aa one might wish for, riTouran may be had lo the heat gen-eiatur. gen-eiatur. shown in the accompanying drawing, which Is Ihn Idea uf (leurge H. Chase of Springfield. Mass. Tho In-ventlon In-ventlon Is practically a radiator, which gather up the rlelr.g heat raya from thn Hume uf tho lamp and dla-Irlbutea dla-Irlbutea them about the room Inatend , nf allowing thou) to rise vertically lo the celling. The circulation of thla heated air ahui produces a current which druwH the air from tho room ai.il brli i It in c-ontri.-t wll:i thn hot surface of the generator, thus further Inert tiding the geuciutlon of wane air. Tim generator Is built up of a, scries of thin metal pltitca, with an upcnliig at the boi loin for the Inner lion of fie lamp chimney. II la sup ported by a vertical pint and project lug arm. the latter being hinged lo Pressure of Light I The pressure of light Impinging nn bodlna, flrat predicted hy Maxwell, has lately been actually measured. The consequent repulsion between tho aim and the earth, for example, la very great and amounts tu about loii.OOO.uuii.uuo.unu dynes. The gravitational gravi-tational attraction between the two bodice b, uf courao, very muc!t greater: It la, In fact, about 4,ouo,-UlHi.ouo.oOO, 4,ouo,-UlHi.ouo.oOO, times aa great. I'rof. Woodward concludea hla address ad-dress with the remark that It la a curious and a pnssllng, though perfectly per-fectly obvious, fnct. that mankind as a whole. Uvea far leas In the thought ot the preaent than In the thought of the past, and that aa a race wa have more respect for the myths of doing up tn a balloon is a feat that tho majority nf people do cot care to ' ,y-ei lffff perform, but If tht balloon worn captive, cap-tive, with no r'mnee for It to parnpft. It would make little difference at what Thu foundation alone of the flrat RenertttliiK atutlou of the South Wait a , Klectrlfi Tower Itlutrlbutlou company ; waa recently tuld by Hlr Frederick I Hruniwell. Thui baa been luaiiKuraled, , Bitya Nuture, the aeeond achema In tireut llrltnln for the supply of nlec-trtcity nlec-trtcity tn bulk, tho tlrat havlnx bnen itartod laat year at Newcastle on- 1 Tyne. Ttie area which will be aup-plied aup-plied by the LSouth Wales rnmpuuy i haa an extent of about 1,000 arpiare ml lea. The dlatrlct Includes collier- not faneled hy any one. Iloth of taa alKte objectlona are overcome In tt tran ahown In the accompanying draalPK. the Invention of Joeep Chaanot of TorrliiRton, Conn. TUa device ronalata of a water reaenolr. two bait holdera and a tilt-Inn tilt-Inn platform. The prliaary halt holder hold-er la located above the Inclined runway, run-way, and t in nee olid holder over the tMtliiK platform. In one. the animal. Audit ft It dl(ll nit to Ret the halt fmm I be pr'mary holder, will nneve forward rd attempt tu oblnln fie aerond ntorse). In no doing he will pnaa be rmd tho pivoted ix.l.it of the tlltlua pint form and hla wcikM will caune It to tilt and will proctpltutn hlin Intr. . ( the re.M'rvolr. where the death penalty pen-alty la liililr teii. The ptiitform Im-mediate!)' Im-mediate!)' resume) Ita oDerallvo oottb Hon. permit the neater to lo elevated for the nnovnl nf the lamp. Aa the aleevt which mrrlen the aupfiortlnK arm If adjuatnhle nn tho poat, a lamp of any r,l.e can be used. unci, as there Is no connection between Iho chimney antf the cMicrutor. ihn lump can bo In-stubUr In-stubUr removed If occasion requires. antiquity than we havi for tho certainties cer-tainties of iixuct science. From tltnn Immemorial tradition haa dominated reason in the masaea of num. Kacli I race haa lived under the away of the thought of aome preceding age. Aa n . vigorous thinker he rcgrnta the waale or human effort and of human time. Those who are Interested In thla aspect as-pect of the subject will do well to compare this addresa with ono by Dr. Langloy on the ("Lawa of Nature." printed In Hclenc fur June 13. Ilia contention la that there are no "law. of nature," no certainties of exact k ' " science. The discrepancy In conclu- li alona Is not difficult to unravel, but H there la no apace here available. U Readers ara advlii-d to Boo the two 0 addresses In question, n Ctvptive Balloon Observatory fj height It waa anchored; the higher up It waa the greater would be the temp-Intlon temp-Intlon lo ascend and view Hie scenory. Tho Intention of the Inventor la to provide a car of aulllclent buoyancy to carry cablea of great length, with means fur drawing the balloon down to anchor It c lose to the ground whoa not In use. Tho i;aa reservoir la divided di-vided Into section., with an equal amount of gua In each, and lu cane ot puncture- In one of the aerlloui the remaining pockets would have aulllclent aulll-clent buoyancy to support the car until un-til repairs could be made. It la olromly common practice to attach at-tach a balloon lo a alngln cable wound un a drum and allow a few persons per-sons to ascend at a time, but the amount of power required la much greater thnn Hint necessary lo ralsa the elevator In thla cane. There la a central opening In the observation platrorm, through which Iho car rlaea to dlaclut.Mo and tuke on passengers, with a sltiglK-alilo to operate the car. Joseph Ureta of Now York Is the Inventor, Adjustable Dook Holder Adjustsbl Book Holder, The book holder shown In the plr-hire plr-hire I. callable nf attachment to the wall, tree, gua fixture or a piece ot furniture, and In all caaea the book la hold perfectly quiet, and when once properly adjusted under tho light there la nu variation, and the arms and body of the reader are free to find the nio.t comfortuhle position possl ble. There la a shelf of aufflclent Bite to aupport an ordinary book, with a clamp eliding on ttie vortical rod to huld the bunk tipen at the proper place. The upper part of the fixture consists of a lelescuplng rod which ran be adjusted tn any desired length and haa a hook between the aupport and the crimped hnrlznntal portion of the rod below. Thla crimp permits tho adjustment nf the book or paper at any desired angle, the sliding clamp holding the reading matter In place even when the support la tilted forward beyond the vortical line. Ed pi win 8. Antlsdulo of Chicago, III., L the Inventor. v. Electricity In Britain I Irs. steel wurka. tin pinto and rnppnr i-' wnrk. and numerous other factories 2 of different kinds There will be five. f Btutloiia. Tho dynamos three-phase, j alternator will be driven by etenin, f tho englnea having a total capacity of 1 , l.tiuu horse power. I Klre engine, aro carried on trolley J care In Springfield. Mass. The car i la but nine and a half Inehea high and 1 the trucka under one end can lit i inoyei and the englno run upon It |
