INDEX. 
184 
Page. 
Scirpus ....... 176 
Screw-bean. 163 
Screw-tree. 163 
Scrophulariacem. 168 
Scutellaria. 169 
Selenia. 160,177 
Senecio. 167 
Sieydium. 164 
Silene. 160 
Simsia... 166 
Sisymbrium.. 159 
Sisyrinchium... 176 
Smilaceae. 176 
Smil'ax. 176 
Solanaceae. 172 
Solanum. 172 
Solidago. 166 
Sopbora.... 163 
Sphaeralcea. 161 
Stegnocarpus. 169,178 
Stenandrium. 168,177 
Stellingia. 174 
Streptantbus. 159 
Strombocarpa. 163 
Stylosantbes. 163 
Sueda. 173 
T. 
Tables— 
Cost, length, &c., of road. 45 
Ascents and descents.... 46 
Natural history collection. 94 
Analyses of soils.. 95,96,97 
Analyses of mineral waters. 97 
Camping places on line of survey. 98-99 
Meteorological observations.... 100-103 
Latitude, longitude, and magnetic declinations.. 104 
Altitude of stations above sea-level. 105-107 
Observations for determining profile from El 
Paso to Preston. 108-110 
Observations for determining profile from Emi¬ 
grant Crossing of the Pecos to Big Springs of 
Colorado.1. Ill 
Observations for determining profile through San 
Augustine Pass of the Organ mountains. Ill 
Astronomical observations. 112-156 
Tanks— 
Alamos. 11,30 
Cornudos, or Thome’s wells... 11,30 
Hueco.-. 7,11,30 
(See Springs.) 
Taplin, Captain C. L.— 
Charge of geological collection. 3 
Detail of. 52 
Instructions to for examining the Llano Estacado 60 
Report. 73 
Terminus (eastern) of the road... 49 
Texas— 
Grant of land by. 50 
Settlement of. 48 
Page. 
Thorne’s wells. 30 
Timber— 
Between 32d and 34th parallels. 5 
32d parallel, near Guadalupe mountains. 7,8 
Valley of the Pecos. 8,29 
Valley of Eed river.9,24,25 
V alley of the Brazos..^.. 9,26-27,40,88 
Country drained by tributaries of Red river.... 10 
Between Arkansas and Rio Grande valley__ 10 
33d parallel. 22 
Colorado valley.22,27,28 
East face of Guadalupe mountains. 11,44 
West face of Guadalupe mountains. 11 
Trinity River valley. 26 
Llano Estacado.28,41-42 
Between Red river and base of Llano Estacado. 40-41 
Between Pecos river and Rio Grande. 42-45 
(See Wood.) 
Tonkawa Indians. 17 
Trinity river and valley. 26 
Tephrosia. 162 
Teucrium. 169 
Thelesperma. 167 
Tiquilia .. 171 
Tornio. 163 
Townsendia. 166 
Tradescantia. 176 
Tragia. 174 
Tripsacum. 176 
U. 
Upper Cross Timbers...26,40,90 
Utah Indians. 17 
Umbelliferse. 165 
Ungnadia. 162 
Urticacese... 175 
V. 
Valerianaceae. 166 
Verbena. 169 
Verbenacese. 169 
Veronica. 168 
Vesicaria. 159,160 
Vicia.... 162 
Vitaceae.-... 162 
Vitia. 162 
W. 
Waco Indians. 17 
Water— 
Between 32d and 34th parallels. 5 
Between valley of Rio Grande and Red river ... 6 
Between valley of Rio Grande and Pecos river. 6,42-45 
Between Arkansas and Rio Grande valley. 10 
Along the route.11-12,21,98-99 
In Llano Estacado_......._11,21,28—29,35—38 
Route from La Vaca bay to Dona Ana. 23 
Valley of Delaware creek.23,29-30 
Jornada del Muerto. 24 
Between Eed river and Llano Estacado. 40-41 
