Dr. Weddell endeavoured to obtain reliable information as to the quantity of coca cultivated and collected in the province of Yongas, and states, as a result, that the annual produce is about 400,000 bales, or 9,600,000 Spanish pounds. There is also a large cultivation, not only in other parts of Bolivia, and in Peru, but also in parts of Brazil, so that this cannot represent more than half the amount of the annual consumption of coca. It is true that Pöppig estimated fifteen millions of pounds as the quantity consumed, but this would be too small. On the other hand, Johnston estimates the consumption at thirty millions of pounds; this is, probably, erring rather on the contrary side. Of this quantity he estimates the value at one million and a half sterling, and concludes that the chewing of coca is indulged in by about ten millions of the human race. This again is rather a “long bow;” the use of coca seems to be confined to Peru, Bolivia, and Brazil—at any rate, it is confined to South America, and there is no mention of its indulgence in Chili to the South, or in the Columbian Republics to the North. It would, moreover, confer upon us somewhat of a personal favour, were some one to convince us that the male population of South America amounts to the number which the professor has estimated as that of the indulgers in coca. Our own impression is, that the entire population has only been estimated at seventeen and a quarter millions: this is, at least, the mean of four very respectable authorities. Suppose half of these to be children, and half of the residue females, and we have only an adult male population of less than four and a half millions in the southern half of the New World. Ye shades of Cocker and De Morgan! tell us how from these we can subtract ten millions who indulge in coca, and yet show a remainder, be it ever so small, of abstainers. But it has never been affirmed that coca was indulged in, except in Peru, Bolivia, and Brazil. The population of these three countries amount, according to the higher authorities, only to ten millions, so that every man, woman, and child, must be a coquero to reach the estimated number. Viewing this subject in another of its phases—Johnston states that the average consumption of the coquero is from one ounce to one ounce and a half per day, or, according to ordinary computation, twenty-two to thirty-three pounds per year, whereas the estimated production, which we have presumed to be too large, is, in fact, too small for the number estimated as indulging therein, as it only allows each coca masticator three pounds per annum. In all deference to so high an authority, we will venture to suggest that were the number indulging in coca limited to two millions, and the supply to twenty millions of pounds, or ten pounds annually to each person, some of these difficulties would be removed; but, out of regard for the patience of our readers, we will forbear detailing any further