TRIGONOMETRICAL SURVEY OF NEW SOUTH WALES. 223 
judiciously spread over the area surveyed, gives, as a rule, a fairly 
approximate value of the local disturbances. Such a discussion 
may therefore be concluded to afford a means of arriving at the 
general shape of the surface, independently of a consideration of 
the purely local effects, provided that sufficient observations have 
been made. From such a treatment the spheroidal figure best 
according with the measurements made in the survey of Great 
Britain and Ireland was determined, and a similar examination 
has now been made to ascertain the spheroid best representing 
the surface of this country. 
The following tables show the astronomical latitudes, azimuths, 
and longitudes at the observing stations, as well as the differences 
between these and the similar elements deduced from the 
triangulation. 
Geodetic and Astronomical Data. 
LATITUDE. 
Station. Geodetic. Astronomical. G.—A. 
° , u" ° , u 
Obsenvatonry, ....cnse0ssc0e: 33 51 41° 1 |83 51 41° 1 | (assumed zero) 
CEM Obre ceectttaccmecea scat 32 59 10:24 11:23 —0°99 
Wrarrawolongs...cn.9-06 <0: 33 2 44:89 43°90 +0°99 
IMIATOOGAY concn esceeasese cen se 38) 28) Bethy Doo —1°58 
WONT ELE since nacsjeosite povens- 33 26 19:05 16°79 +2°26 
Wastlew an castanmsccedeeseta xc 33 42 26:28 26°93 —0°65 
Basesshichids Nev socecssescee 33 35 58:07 58°84 —0‘77 
IBAsesEMICHGe SS. seaeneese cee 33 39 44°63 44°99 —0°36 
OUT tects seve cde tee voiist 33. 330 (7°71 8°83 —1°12 
SCOUbinE soe stenceecnsere en aan BB) ay BAY) 4°33 —2°'14 
Bal dieawenr sant sneriessaicdes. 33 26 52°42 52°06 +0°36 
Bind Omens were tesce vssvcnsons 33 40 44°57 42°50 +2:°07 
ILE OF Diss caenconapodeoadeoone: 33 28 24:04 25°37 —1°33 
WOW ESE cecescccnicslersuesenes SOOO MOlESL 25°04 +6:27 
(OKWENY Scape nce iconn te anen tees 33 24 46°67 46:22 +0°45 
OW aT dlenyceuscmasecncosessar: 33 49 13:90 18:07 —4:17 
Buttalope ness necseastesediasses 34 34 54°81 50°95 +3°86 
WYoronora “.1c...-.s- mee 34 7 5:98 5°39 +0°59 
ellone tee ccrcsccecncee nen sce 34 22 16:99 12°80 +419 
Gilonaltarceecessrsececencest: 34 28 2:09 27 +59:09 +3:00 
TOW MAM Fs seceineiarescsisssieyin, ass 34 45 21°36 20°38 +0°98 
Allianoyonyiga ............ 35 2 22°57 23°50 —0°93 
Basen Geon Sevceccuccees Bis eh Sey 19-26 +3°21 
AGITMANATI ON sate seiewisliee cela 35 45 2:24 0:98 +1:26 
Wimarallaas.cneceres.maesc: 36 11 56-01 53°83 +2-18 
Wiamlbrookeeeeesceseree 30m LIE opR24: 36°17 —0°93 
@oomMaeankeorcesnceceoneee 36 15 13°40 11°94 +1°46 
LUG Sone gasctsck cnin ease 36 26 35°60 35°77 —0°17 
IN( ESTOS: “Gaesonuscecsnoatoacec 36 37) «65°74 9°12 —3'38 
Bakalong so c.ccs.acsecse-csee 36 48 28:07 31:07 —3°00 
Substitute ..... “Ae ancroenter. 37 «10 «33°40 38°40 —5-00 
eN@mialatecscesctinise: casnesens 33 32. 45°44 45°96 —0°52 
