ORIGIN AND PROGRESS OF GEODETIC SURVEY IN SOUTH AFRICA. 243 
Closure in Latitude, Longitude, and Azimuth. 
Circuit 1. 
Terminal line: Kliprug—Spionberg IT. 
Lat. Long. Az. 
Right hand—Left-hand Branch + 0'7032 +0'105 +0'"075 
Circuit 2. 
Terminal line : Canaryfontein-Elandsbere. 
Lat. Long. Az. 
Right hand-Left-hand Branch + 0'028 + 0''-050 — 4!'-229, 
Tn circuits 1 and 2 the errors of closure are those obtained after closure of bases. 
Circuit 7. 
‘Closure on Drakensberg-Salt Lake through north, west, south, east. 
Lat. Long. Az. 
‘ Geodetic Survey,’ Vol. i. minus. Computed +0'-021 + 0''-060 —0''43 
Circuit 5+7. 
Closure on Xuka-Lubizi through north, west, south. 
Lat. Long. Az. 
*€G. 8.’ Vol. i—Computed +0'"172 +0'"120 —1''48, 
Cirewt 3444547, 
Junctions at Scholtz Kop with Tarental Kop. 
From Drakensberg (‘ G. 8,’ Vol. i.) to Scholtz- Kop (‘ G. 8.’ Vol. i.) 
: ’ : ; Lat. Long. Az. 
(‘G. 8.’ Vol. i.)—Computed +0048 +0" 044 —2'"-78 
Cirenit 3, 4 +0'266 —0'"076 —1'":30 
Circuit 5 + 0'°151 + 0'"060 —1" 05 
It will be observed that the chains joining Hopetown and Wepener, 
Kimberley and Ottoshoop, Ottoshoop and Pretoria and Belfast with the 
Limpopo or Houts River base, are not yet completed, and therefore these 
circuits cannot be yet discussed. But enough has been done to show the 
high character of the work. 
We turn now to the geodetic results. 
Taking first of all arcs of meridian, and beginning from west to east, 
we haye 
The Are near the Meridian of 19° E. Long. 
This are depends in the south on Sir Thomas Maclear’s are, part of which 
has been re-observed by Colonel Morris and entirely re-reduced to the 
gridiron system of the ‘ Geodetic Survey of Cape Colony ’ ; then on Alston’s 
triangulation to the Orange River, then on Bosman’s triangulation along 
the 20th meridian to South Reitfontein, and thence northward to Lati- 
tude 22 South, through Damaraland, by the Anglo-German Boundary 
Commissioners, Laffan, Wittstein, and Doering. 
R2 
