The Astrophysical journal . g with zinc, reached its former(/Hj value. In order to raise the coefifi-cient of absorption, the strips werefinally given when cold a thin coat-ing of lamj)black. This coating wasobtained from a stearin candle, inthe flame of which was held a finenet of copper wire. The readinessof the strips for use is tested bvconnecting the thermo-element to asensitive gah^anometer. If the posi-tion of rest of the galvanometerdoes not chance for simultaneousradiation upon the two strips, the symmetry is complete. The juounting of the apparatus is shown in Fig. 2 (one thirdthe na
The Astrophysical journal . g with zinc, reached its former(/Hj value. In order to raise the coefifi-cient of absorption, the strips werefinally given when cold a thin coat-ing of lamj)black. This coating wasobtained from a stearin candle, inthe flame of which was held a finenet of copper wire. The readinessof the strips for use is tested bvconnecting the thermo-element to asensitive gah^anometer. If the posi-tion of rest of the galvanometerdoes not chance for simultaneousradiation upon the two strips, the symmetry is complete. The juounting of the apparatus is shown in Fig. 2 (one thirdthe natural size). The strips areplaced in a tube R, which is pro-vided with three tube can be pointed in anydesired direction by two screwsS^ and S.^. The temperature inthe tube can be determined bymeans of a thermometer T. Asmall double-walled, reversiblescreen W, which is fastened inthe front end of the tube, protects the one strij) from the radia-tion. The back side of the tube is closed bv an ebonite stop{:)er. Fig. 2.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectspectru, bookyear1895
