PROCEEDINGS OF SECTION E. 551 



too far east ; wliilst a line surveyed the following year by Captain 

 Delisser, of the Survey Department, as a fixing for pastoral leases, is 

 about one and a half miles too far west. 



In May, 1880, Captain Howard, R.N., Admiralty Surveyor, ex- 

 changed time signals from Eucla telegraph station with the Adelaide 

 Observatory. On the 4th May he found the difference of time to be 

 38min. 46-34secs., and on the 6th to be 38min. 47-22secs ; the mean of 

 these results is 38min. 46-78secs., corresponding to 9hrs. 41niins. 42"72secs. 

 of time E. of Greenwich, giving longitude 128" 53' 21"-78 for Eucla 

 Telegraph Station. 



Three years prior to this (April, 1877) the same officer exchanged 

 satisfactory time signals with Adelaide from the telegraph station at 

 Flinders, Streaky Bav. He made the difference of time 17min. 28-9sec., 

 or 4° 22' 13", which gives longitude 134° 12' 51" ; that is about 100yds. 

 farther west than by Survey Office data. 



EASTERN BOUNDARY— NORTH OF THE MURRAY. 



In order to fix the position of the lllst meridian of longitude 

 forming the boundary between South Australia and New Soiith Wales, 

 the Governments of the two States concerned authorised their astrono- 

 mers, Messrs. C. Todd and G. R. Sraalley, to decide the position. This 

 they did by telegraphic time signals between Melbourne and Sydney 

 from a temporary observatory on the north banlc of the Murray, where 

 the boundary was supposed to be, using for the purpose a 4ft. transit 

 instrument, having an aperture of 2^in. and furnished with several 

 vertical spider lines, and three chronometers. (See P.P. 182, vol. III., 

 1868-9). 



A discrepancy in the accepted longitudes of the two capitals 

 rendered the work subject to a slight uncertainty, but fortunately the 

 brick pyramid then erected, from which the line was marked out, 

 coincides with the true position of the Lllst raeridan, as obtained by 

 triangulation from Adelaide Observatory; and by time signals, made 

 August, 1890, between Sydney and the town of Burns (at the 134th 

 milepost north of the river), by J. Brooks, Esq., Field Astronomer. 



PALMERSTON. 



Whilst the survey of Palmerston was proceeding, together with 

 lands adjacent, in 1869, the Surveyor-General (Mr. G. W. Goyder) 

 took several lunar observations with a portable transit and sextant. 

 The longitude of Fort Hill thus obtained he recorded as 130° 52' 40", 

 several miles nearer the true position than shown by any available 

 chart. The correct longitude of Fort Hill, deduced from the cable 

 station, is 130° 50' 44"-3. 



During the construction of the overland telegraph line, 1870-1, a 

 scientific member of the party took a great many lunar observations 

 at Charlotte Waters, and a few years later communicated the result 

 to the writer, expressing the belief that they would ultimately be found 

 exact. His determination was 134° 58' 00", now found to be 134° 

 55' 08". 



