244 



MKSSKS. K. TIIKELFALL AND J. A. POLLOCK 



the same amount. This frame was put in as the result of an after-thought, after the 

 instrument had been completed, and there was not then room for an adequately 

 designed girder. We attributed the discontinuities observed to the bending of this 

 frame, and it was taken out immediately on our return to Sydney, with the result 

 that there has not been any appreciable discontinuity in a series of readings since 



Plot 3. 



September 1097. 

 Headings reduced to 14 C. 



that date. The difference between the reading at Sydney on June 2nd, and that at 

 Melbourne on the 4th and 5th, may be taken at 39 (sextant minutes), and that 

 between the observation at Melbourne on June 14th, and that at Sydney on the 

 following day, as 29 (sextant minutes). The mean of these, 34 (sextant minutes), 

 confirms, so far as it can be said to confirm anything, a result which we obtained in 

 the following year, as will be seen later. We had quite concluded before we returned 



