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Show 222 HYPSOMETRIC ADDENDA. French feet. Eng. feet. Observer. Mexico 7008 7990 Ht. Tula 6318 6733 Ht. San Juan del Rio 6090 6490 Ht. Queretaro 5970 6363 Ht. Celaya 5646 6017 Ht. Salamanca 5406 5761 Ht. Guanaxuato 6414 6836 Ht. Silao 5546 5910 Br. Villa de Leon 5755 6133 Br. Lagos 5983 6376 Br. Aguas Calienres 5875 6261 Br. San Luis Potosi 5714 6090 Br. Zacatecas 7544 8040 Br. Fresnillo 6797 7244 Br. Durango 6426 6848 (Oteiza) Parras 4678 4985 Ws. Saltillo 4917 5240 Ws. El Bolson de Mapimi e600 to 4200 3837to} 4476 Ws. Chihuahua 4352 4638 Ws. Cosiquiriachi 5886 6273 Ws. Passo del Norte, on the Rio Grande del Norte 3557 3812 Ws. Santa Fe del Nuevo Mexico - 6612 7047 Ws. The letters Ws., Br., and Ht., are placed to distinguish the barometric measurements of Dr. Wislizenus, Oberbergrath Burkart, and my own. Wislizenus has appended to his valuable memoir three vertical sections of the surface of the ground: one from Santa Fe to Chihuahua by Passo del Norte ; one from Chihuahua to Reynosa by Parras; and one from Fort Independence (a little to the east of the confluence of the Missouri and the Kanzas River) to Santa Fe. The calculation is founded on daily corresponding observations of the barometer, made by Engelmann at St. Louis, and by Lilly at New Orleans. If we consider that the difference of latitude between Santa Fe and Mexico is 16°, and that thus (apart from deviations from a straight line) the distance in the north anu south direction is above 960 geographical miles, we are led to inquire whether there be in any other part of the whole globe a similar conformation of the earth, equal in extent and elevation (between 5000 and 7000 French or 5330 and 7460 English feet above the level of the sea) to the |
