INDEX, 
183 
Pa c. 
Profiles— 
Instruments used in determination.. 2 
Table of observations for determining from El 
Paso to Preston. 108-110 
Table of observations for determining from Em¬ 
igrant Crossing of Pecos to Big Springs of the 
Colorado. Ill 
Table of observations for determining through 
San Augustine Pass of the Organ mountains. Ill 
Panicum. 176 
Parietaria. 175 
Paronychia.-. 160 
Parthenium. 166 
Passaveraceae... 159 
Passiflora. 165 
Passifloraceas. 165 
Pectocarya. 171 
Pentalophus. 171 
Pentstemon.168,169,178 
Perezia.. 167 
Petalostemon... 163 
Phacelia. 172,178 
Phalaris. 176 
Phlox. 172 
Physalis. 173 
Phytolacca. 174 
Phytolaccaceae. 174 
Picradenia... 167 
Pinaropappus. 160 
Planera. 175 
Plantaginaceae. 168 
Plantago. 168 
Poa. 176 
Polemoniaceae. 172 
Potamogeton. 176 
Polygala. 162 
Polygalaceae. 162 
Polygonaceae. 174 
Polygonum... 174 
Polytaenia. 165 
Primulaceae. 168 
Prosopis. 163 
Prunus. 164 
Pseudoscordum. 176 
Psoralea. 163 
Pteris. 177 
Ptilocalyx. 170,178 
Pyrrhopappus.. 168 
Q. 
Quercus. 175 
E. 
Eed fork of the Colorado. 85 
Eed river and valley...10,25-26,29 
Eio Grande and valley.6,31-34 
Ranunculaceae. 159 
Ehamnaceae. 162 
Ehus. 162 
Eibes. 165 
Page. 
Eiddellia. 167 
Eosa. 164 
Eubiaceae... 166 
Eubus. 164 
Eumex. 174 
Eosaceae. 164 
Rutacese. 161 
Eutidocaryum... 171 
Eutosma. 161 
S. 
Sacramento mountains. 31 
Sacramento river. 65 
SanElizario. 6,32 
San Tomas village. 6 
Sanchez, chief of Camanches. 81 
Santa Fe trade. 47-48 
Sand-hills. 69 
Character of, on hills adjoining Llano Estacado. 9 
Selection of route across the plains... 21 
Selenite. 68 
Settlement of Texas. 48 
Sierra de los Alamos. 54 
Simpson, Captain, reference to report of.. 9 
Soils— 
Plan of collecting. 2 
Submitted to. 3 
Preliminary report on. 95-97 
Analyses of... 95-97 
Springs— 
Delaware. 11,29,97 
Independence. 11,30 
Mineral.. 2-32 
Mustang. 71,97 
Ojo del Cuerbo.11,30,55 
Ojo del San Martin.^. 52 
Ojo de la Solidad..... 52 
Sulphur, of the Colorado...11,78,97 
(See Tanks.) 
Staked Plain.—(See Llano Estacado.) 
Stem, Colonel Jefferson, Indian agent. 86 
Stone for building, near head of Delaware creek .... 23 
Colorado valley. 27 
on Delaware creek. 29 
between Eed river and Llano Es¬ 
tacado. 40-41 
Llano Estacado. 41-42 
between Pecos river and Eio 
Grande. 42-45 
Sulphur springs of the Colorado.11,78,97 
Sabbatia. 173 
Salicacese. 175 
Salvia. 169 
Salviastrum. 169,178 
Santalacese.-. 175 
Sapindacese. 162 
Sapindus. 162 
Schrankia. 164 
Scilla. 176 
