β Scribed by G.F.S.
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CURRENr TOPICS.
in the bomb to provide the lines to be observed. Before explosion there was a continuous spectrum. Upon explosion the D lines appeared dark and, later, they flashed up bright, provided the arc of the lamp was cooler than the gases developed. It was possible to adjust the temperature of the arc until the lines just about appeared when the explosion came. Thus within an error of IO Β° the temperature within the bomb was found to be 21oo Β° C. By the reversal method the temperature of a flame of atomic hydrogen was determined four times with these results, 2525 Β°, 249 oΒ°, 254 oΒ° and 2515 Β° C. G. F. S.
π SIMILAR VOLUMES
Leaving the observational accuracy of measuring directions in radial triangulation out of consideration, it is evident that the external accuracy of radial triangulation depends on the systematic errors in the directions measured, which are functions of the inclination of the camera and of the terra