CONTENTS. 
PAR 
Page. 
Engineering Reports. 
Landing of the Expedition at Mina- 
titlan 11 
Major Barnard's Instructions 11 
General Topographical View of 
the Isthmus 13 
Cortes' Examination of the Coat- 
zacoalcos Bar 23 
Disposition of the Railroad par- 
ties 23 
General Description of Route 25 
Reconnaissance to Mt. Encantada . 29 
Report on the Line North of the 
Dividing Ridge 38 
Reconnaissance of the Country east 
of Coatzacoalcos River 51 
Table of Grades from Jaltepec 
River to Pacific Plains 54 
Tangents, Curvature, etc., Middle 
Division 56 
Comparative Table of Grades, Cur- 
vature, etc 56 
Railroad Distances across the Isth- 
mus of Tehuantepec 57 
Native Labor 58 
Ibid. (Letter of J. C. Trautwine, 
Esq.) 59 
Material for Construction 60 
Estimated Cost of Construction... 61 
Summary of Cost of Construction 66 
Superstructure 61 
Equipment 67 
Station Buildings 68 
Auxiliary Carriage-Road 68 
Distance by ditto and Coatzacoal- 
cos River 72 
Estimated Cost of Auxiliary Road 73 
Income of ditto 74 
General Summary of Total Cost ... 77 
Comparative Cost of Principal 
Roads in the United States. ... 78 
Comparative Cost of Principal 
Roads in England 78 
Proposed Lines 78 
Mountain Passes 81 
T I. 
Page. 
Hydrographic Reports. 
Survey of the Coatzacoalcos 83 
Major Barnard's Instructions 83 
Lieut. Leigh's Chart 84 
Manner of Conducting Survey 85 
Head of Ship Navigation 85 
Capacity for Shoal-water Naviga- 
tion 88 
Effect of Rains 88 
Formation of Coatzacoalcos Bar... 90 
Reconnaissance of the Rio del 
Corte 92 
Vegetable Productions 92 
Geological Character of Mountains 94 
Scenery on Rio del Corte 95 
Tributaries 96 
Rapid of Alto Mayor 97 
Height of Water in Rio del Corte 98 
Survey of Vspanapa River 99 
Vegetation of River Banks 100 
El Rompido 101 
Arroyo de los Urgells 102 
River Tancochapa 102 
Hacienda of San Jose 102 
Rancho Maria del Carmen 102 
Capacity of River for Navigation 104 
Pacific Ports. 
Survey of Ventosa by Mr. Trastour 104 
Temperature of the Pacific Coast 110 
Mr. Temple's Report on Ventosa . Ill 
General Summary. 
Practicability of the Road 112 
Expenses of Construction 113 
Equipment 114 
Formation of the Coatzacoalcos 
Bar 114 
Sailing directions for the Coatza- 
coalcos Bar 116 
Capacity of Rivers for Navigation 116 
Improvement of the Harbor of 
Ventosa 116 
Letter of Capt. Mott of the 
Steamer " Gold Hunter".....,... 117 
