10 
A Comparative Table of Distances which would result from 
opening a Ship Canal across the Isthmus of Tehuantepec, prov- 
ing at one view the palpable advantages of such an enterprise 
being accomplished, is now given for the first time ; as also 
a Table of various Canals in different countries, shewing that 
the proposed Canal of Tehuantepec diflTers in no extraordinary 
degree in any of its dimensions of length, depth, breadth, 
lockage, or summit level to be crossed, from similar works 
already executed in Great Britain, France, Holland, or the 
United States — these will be found in the Appendix, such 
additional information being deemed useful to the public for 
forming a correct estimate of all the bearings of the present 
Project now submitted to its judgment for approval. 
