The London, Edinburgh and Dublin philosophical magazine and journal of science . RR (fig. fi),one of which was interior to the other, the in-terval being filled up with toluol occupyingalso the capillary tube T. The latter was, on the other hand, connected to a reservoirP containing mercury by a tube furnished with a cockand a rubber tube. By raising or lowering P, the heightof mercury in the tube, and thus that of the toluol inthe tube T could be varied. QAR Oscillatory Discharges* 21 Round the exterior recipient R there was wound asufficient layer of wool cloth, the whole being placed within
The London, Edinburgh and Dublin philosophical magazine and journal of science . RR (fig. fi),one of which was interior to the other, the in-terval being filled up with toluol occupyingalso the capillary tube T. The latter was, on the other hand, connected to a reservoirP containing mercury by a tube furnished with a cockand a rubber tube. By raising or lowering P, the heightof mercury in the tube, and thus that of the toluol inthe tube T could be varied. QAR Oscillatory Discharges* 21 Round the exterior recipient R there was wound asufficient layer of wool cloth, the whole being placed withina wooden box C, and being capable of moving by means o£the arm NO, to which it was attached, along the brass rod A,and being thus raised to different heights. the arrangement above describedto pass freely when taking the ;e ol spar J We had to make Ufin order to cause thephotographs. When photographs hadat the level shown in fig. pass freely when taking- be taken,In order the box was fixednext to insert the spark into the calorimeter it sufficed to raise the arm NO. Fig-. A good closing of the two openings aaf of the calorimetricrecipient R was obtained by passing the brass rods D, D ofthe spark-gap through rubber tubes at the part near the inter-ruption where the spark occurred. This method of closing-allowed of placing the calorimeter in position with all de-sirable facility and speed when the heat evolved in thespark was to be determined. This form of calorimeter seemed more adequate than thosepreviously used by other experimenters, as we avoided thetrouble due to the explosive and electrostatic effects of thespark. Moreover, we avoided the difficulties, met with inthe case of air-calorimeters being used, in the accurate deter-mination of the part played by the expansion of the gas in 22 Prof. A. Battelli and Mr. L. Magri on the displacement of the liquid column in a capillary the tube be not of perfectly constant calibre, this displace-ment is influenced to a n
Size: 1218px × 2050px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, bookidlondon, booksubjectscience
