_Analysis of Prepared Guano._--We give an analysis of one sample of domestic manufacture, and two British. No. 1. was offered in London and actually sold as Peruvian guano, to farmers in the south of England; just because they were so neglectful of their own interests as not to inform themselves that an article sold for $35 a ton, could not be genuine, while the regular government price remained fixed at $47. It may readily be seen by the analysis, how they were cheated into paying that price for an article of which 74 per cent. is plaster, and only half of one per cent. ammonia. No. 1. Gypsum, 74.05 Phosphate of lime, 14.05 Sand, 2.64 Moisture and loss, 9.26 ------ 100.00 ------ Ammonia, 0.51 The other sample is still worse. This was sold as Saldana Bay guano, at $15 to $20 a ton. It was composed of Sand, 48.81 Phosphate of lime, 10.21 Gypsum, 5.81 Chalk, 22.73 Moisture, 12.44 ------ 100.00 ------ Ammonia, a trace It would have been dear at half the price. But why? perhaps you inquire, do you give these samples of rascality in England? Just to show you what men are capable of doing there, they will probably do here--nay, have done. Here is the analysis of an article which was sold in the city of New York, under the name of _prepared guano_. The analysis was made by the lately deceased, highly respected, and eminent analytic chemist, Professor Norton, of Yale College, showing the following result. Water, 4.35 Alumina and phosphate of lime, 7.82 Organic matter, 32.58 Insoluble matter, 26.05 Carbonate of lime, 28.76 Magnesia, alkalies, and loss, 0.43 ------ 100.00 This analysis was made by the request of the editor of the Genesee Farmer, by whom it is not only endorsed, but proof given of its utter worthlessness upon the land where it was applied. Professor Norton made the following remarks upon the subject.