No. 7.—Some Fixed Points in the Provinces of the Rio de la Plata.

Province of Buenos Ayres.

Place.S. Latitude.Longitude.Where from.Observations.
°´ "°´ "
Centre of the City of Buenos Ayres 343629582334Greenwich
Anchorage of H. M. S Nereus in the Outer Roads in 1813 3434305820"Variation 12½° E.—1813
Luxan3438361110W. of Buenos Ayres
Guardia del Salto34185721449"Variation 14° 39´ E.—1796
Fort Roxas34114824139"
Fort Mercedes3355183414"
Fort Melinqué33422433038"
Corzo, near the Lake (source of the Salado) }3445533632"
Lake Roxas341973256"
Lake Carpincho34353125244"
Lake Toro-Moro3449123830"
Lake Palentalen3510152634"
Lake de los Huesos35143013444"
Lake del Trigo3514311454"
Cisne354600205E. of ditto
Manantiales de Porongos3554500155"
Lake Camerones Grandes360590919"
Altos de Troncoso3653001055"
Fort Chascomus3533502220"
Fort Ranchos3530460320"
Lake Ceajo35294901640W. of ditto
Guardia del Monte3526703110"
Guardia de Lobos3516705210"
Fort Navarro350131325"
N.B. The above positions from Luxan to Navarro were determined in the course of a survey of the frontiers, made in 1796 by Don Felix Azara, aided by Cerviño and Inciarte, all officers attached to the Commission for laying down the boundaries under the treaty, between Spain and Portugal, of 1777. The Statistical Register of Buenos Ayres, for 1822, has added to them the following:—
San Pedro3340511320"
Barradero3343501254"
Conchas34251501031"
Pergamino33531622425"
Areco34115712647"
Arecife (Fort)34382613"
Pilar3426405254"
Cañada de Moron34404502349"
Magdalena355290440E. of ditto

No. 7—continued.

Observations taken on the Journey of Don Pedro Garcia, in 1810, to the Salinas.

Place.S. Latitude.Longitude.Where from.Observations.
°´ "°´ "
Pass of the Salado35201560Buenos Ayres
Palantalen35120270"
Lakes Tres Hermanas352302160"
Cruz de Guerra354102240"
Cabeza del Buey361002520"
First Lake of the Cañada Larga363803240"
Lake del Monte365303570"
Lake da los Paraguayos365804120"
Lake of the Salinas (centre)371304510"
Positions fixed on the Expedition in 1823, to extend the Frontiers.
Fort on the Tandil3721430394"Variation 14° 59´ E.—1823.
Lake beyond the Tinta hills374031270"
Another further on37447207"Var. 15° 18´ E.
Ruins of the Jesuit Mission375948"
By the Officers of His Majesty's Ship Beagle, in 1832.
Cape Corrientes38530572915Greenwich
Sierra Ventana, highest summit381145615618"
Fort Argentine, near Bahia Blanca384350621441"
On the River Negro.
Pilot's house at the entrance of the River Negro41042624615"Var. 17° 42´ E. 1832.
Town of Carmen on ditto40481862580"
East end of the Islands of Choleechel3900"by Villariño, in 1782.
Junction of the River Neuquen38440"
Junction of the River Encarnacion }4060"
Villariños, furthest up the Catapuliché39330"

No. 7—continued.

Positions on the road from Buenos Ayres to Chile, fixed in 1794 by Bauza and Espinosa, Officers attached to Malaspina's Surveying Expedition.

Place.S. Latitude.Longitude.Where from.Observations.
°´ "°´ "
Post of Portezuelas33530Greenwich
Do. of Desmochados33100"
Do. of Sanjon, on the River Tercero3240061450"
Pass on the Tercero322330"
San Luis de la Punta3318065470"
Pass of the Desaguadero33260"
Mendoza325206960"
Uspallata323320"
St. Jago de Chile3326070460"
Provincial Towns.
Cordova3126143143645FerroM. de Souillae, 1784.
Santiago del Estero27470"Azara.
Tucuman"
Salta"
Corrientes27270319550"ditto.
Assumption251640320120"ditto.
Affluents of the River Paraguay.
Mouth of the Vermejo26540by Azara, in 1785.
Do. of the Tebicuari26350
Fort Angostura25320
Mouth of the Pilcomayo25219
Mouth of the Piray2520Quiroga, in 1750
Do. of the Salado2510
Do. Peribibuy24580
Do. Mboicay24560
Do. Ibobi24290
Do. Quarepoti24230
Do. Xexui2470
Do. Ipané-mini2420
Do. Fogones23510
Do. Ipané-guazu23280
Do. Guarambaré2380
Do. Corrientes2220
Do. Tepeti21450
Do. Inboteti19200
Do. Tacuari1900
Do. Porrudos17520
Do. Jaurú16250320100Ferro

No. 7—continued.

Towns in Paraguay.

Place.S. Latitude.Longitude.Where from.Observations.
°´ "°´ "
Yaguaron254115Azara, in 1785.
Itapé255114
Cazapa26953
Yuti26364
Point of embarkation on the Tebicuari263521
The Jesuit Missions of the Uruguay and Paranã, as fixed by the Boundary Commissioners, under the Treaty of 1777.
San Ignacio-guazu26551232159FerroN.B. The difference adopted between the meridian of Ferro and Paris by the Commissioners, was 20° 30´.
Santa Maria de Fé264810321119"
Santa Rosa2653123211428"
Santiago278403212014"
San Cosmo2718553214753"
Itapua27201632214 2"
Candelaria2727143221930"
Santa Ana2723403223123"
Loreto2719443223519"
San Ignacio-mini2714553224311"
Corpus277363223627"
Trinidad277353221920"
Jesus27236322172"
San José2745473221930"
San Carlos274436322111"
Apostoles2754273221945"
Conception2758513223322"
Santa Maria Mayor2753343223859"
San Xavier275183224926"
Martires2750243223649"
San Nicolas2811233224421"
San Luis282541323123"
San Lorenzo2827513231429"
San Miguel2833133232224"
San Juan2827513233722"
San Angel2818133234715"
San Tomas283249322139"
San Borja283951322449"
La Cruz29110321300"
Yapeyú29280321172"
The Gran Salto, or Great Fall on the Paranã24458"by the Boundary Commissioners, 1788.
N.B. Malaspina's Observations on the Shores of the River Plate, alluded to at page [97], are not inserted, owing to some apparent inaccuracies in the Copy received, which cannot be corrected without further reference to Buenos Ayres.