Journal . FERENT ifODES OFEVAPOBATIOS. Per Hour. Evaporation on the water-bath 50 oc. Evaporation over the free flame, which was regulated to avoid loss by spirting .. 70 oc. Evaporition with the regenerative burner 320 cc. A Bunseu burner consumes about 100 to 120 liters of gasper hour, whereas the regenerative burner consumes from300 to 400 liters of gas in the same time.—S. H. A Laboratorij-Turhine. H. Rabe. Ber. 21 1200—1201. For laboratory purposes a mechanical agitator is oftenneeded. The author has therefore devised a water-turbine(shown in sectional plan and elevation, one-half natural
Journal . FERENT ifODES OFEVAPOBATIOS. Per Hour. Evaporation on the water-bath 50 oc. Evaporation over the free flame, which was regulated to avoid loss by spirting .. 70 oc. Evaporition with the regenerative burner 320 cc. A Bunseu burner consumes about 100 to 120 liters of gasper hour, whereas the regenerative burner consumes from300 to 400 liters of gas in the same time.—S. H. A Laboratorij-Turhine. H. Rabe. Ber. 21 1200—1201. For laboratory purposes a mechanical agitator is oftenneeded. The author has therefore devised a water-turbine(shown in sectional plan and elevation, one-half natural size)for use in lalx)ratories possessing a good water supply. A isa cast-iron casing containing the brass paddle-wheel E, withpaddles F on spindle D, mounted in bearings B and (.The water enters at G and leaves at H; with an opening atthe jet G of 1 mm. diameter, the water consumption isI cb. m. per 12 hours. The spindle D also carries the 880 THE JOUBNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. [ pulley 0 which transmits the motion hy :i driving cord tothe agitator. The turhine can hv clanipeil in any positionat I, without loss of power.—U. II. , GAS. AND LIGHT. On Ihe Cdlciiliilinn of Piiromelric Effects, and on theInfluence of Iressure iin the Tewpeiature of liing. Chem. Zelt. 12, 475— author calls in iiucsiion the calculations made by Ottoin a paper {Chem. Zeit. 12, 1-22) dealinfr with his patentederncihle furnace with forced draught. Otto, assuming thatthe comhustion in his furnace takes place at constantvolume, calculates the theoretical temperature hy dividingthe calorific power of carbon (8080) hy the product ofthe weight of the flue gases into their specitic heat atconstant volume, thus obtaining the number 3037. But he considers that 8080 does not represent the true calorificpower of carbon at constant volume, seeing that in thecalorimeter it is tlctcrmined at constant pressure, in whichease a portion of the heat is convert
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
