276 Geographical Position of the 
Lands in New South Wales, and who was especially selected 
by the late Sir George Gipps to ascertain the true geo- 
graphical position of the mouth of the Glenelg, the eastern 
boundary of the colony of South Australia. I am indebted 
both to Capt. P. P. King and to Mr. Tyers for much 
valuable information and assistance in placing their data 
at my disposal Mr. Tyers decided Henty’s Flagstaff at 
Portland to be 
Te ONT eV Sh 
9° 26° 32°1 east of Greenwich. 
Chronometric Difference of Meridians employed in deter- 
mining the Longitude of the Hobart Town Observatory, with 
the Authorities for the same. 
Hopart Town OBSERVATORY TO PARAMATTAOBSERVATORY. 
Hobart Town to Garden Island,* Sydney Harbour. 
Capt. Sir James Ross, R.N., n H.M.S. Bo. Ms. 
** Hrebus and Terror,” 29 chronometers.... 0° 15° 8110 
Capt. Stokes, R.N., in H.M.S. “ Beagle,” 
PC MMOMOMEUCTS ccs tucu tna W saat cosurene nes aio ane 0° 15° 33°37 
Capt. Blackwood, R.N., in H.M.S. “ Fly,” 
DO LG MROMOMICTERS urecareaneteacas cuncnicsdcaxaeeesnescess: O° 15° 34°04 
Capt. Stanley, R.N., in H.M.S. “ Raittle- 
Snake. gl ChnOmOMeters ..1:.-O8 cna oeneeetes ss O° 15%,34°08 
—____— 
Garden Island, east of the Hobart Town 
Observatory, (mean by weight) |......0...0. 0° 15° 83°88 
Garden Island east of ParamattaObservatoryt 0: 00° 55°71 
Paramatta, east of Hobart Town Observatory 0: 14° 88:12 
* Garden Island is the established place of observation for all the 
Officers of H.M. ships that visit Sydney. 
+ See longitude of Fort Macquarie, Sydney Harbour. 
