“It is fifteen several years considering the fact that guano was very first utilized in Europe. Considering the fact that then its consumption has increased up to just about 100,000 tons for every annum. In our personal nation the demands for it were being so various final 12 months that they could not be supplied. From the fantastic and insatiable desire for this manure, it has been issue to the most obtrusive adulterations by mixing it with loam of the same colour as the guano itself. Farmers ought to therefore acquire it of respectable and very well recognised dealers. The ideal high-quality of this fertilizer is the Peruvian.”

—Scientific American, April 1855

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