CHAPTER VI.--Reflections on emigration--Advantages of America--Land

and labor--Mines wrought by Aztecs--Mining districts and extent in Mexico--Errors as to early supply of metals from America--True period of abundance--Mines not exhausted--Condition--Families enriched--Effect of mining on Agriculture--Relative product of silver for ten years--Table of product--Yield of the mines since the Conquest--Coinage in 1844--Total coinage 1535 to 1850, 76