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Show A fur Air ln.lir.tnr. One of the many ctirionily dtTreea Instruments iteiite durlnp the las) few years It ait ap)rinittis for meiuuriiifl the amount of Impure air which may pattier In a room wlihln a plrun iMipili of time. ThU oM mochliw e olutid' from the fell lie brain of l'nifeaeor V4 jrt, of Nurcmburj- It Is writ known tliat Air It ery pol-ynout tn the human bttein when the c.'rlMnie acid gas li thoAtreiecedt 1 part In l.lHMl, In order tn trat tho umtttr and toll eini'lly wltru the one thouKiudtli prl limit hat len reached, Dr Woljrt lint prtMldc! an hiatruimiit or npiaratut conslatlnp of n ewel contalnhiir n aolu tlouof kaIamkI pheuolphihalcln, fnm. which every 100 seconds there emerpei a re1 dnj thnnigh n phon, which h to nrnnpetl as tn tiwvldown Along a prepared white thread about n foot and n half In lengtli. Dehlml th thread Is a scale U-jrfn ulng with '(Hiro nlr" (up to 0 7 i 2,000), at the bottom, and t ndlng aUn t with "cxtirmely Udat tho top In pure nlr thu drop contlmiot red down to the bottom, but It Iomh Its rotor by tho action of tho cAibouto arid gas boonvr tho inoro there l of thnlgu I rwvnt. 6t Ivouli Kepubllo. |
