In the ashes of peats, we almost always find small quantities of sulphate of lime, magnesia and phosphoric acid. Potash and soda too, are often present, though rarely to any considerable amount. Carbonate and sulphate of lime are large ingredients of the ashes of about one-half, of the thirty-three peats and swamp mucks I have examined. The ashes of the other half are largely mixed with sand and soil, but in most cases also contain considerable sulphate of lime, and often carbonates of lime and magnesia. In one swamp-muck, from Milford, Conn., there was found but two _per cent._ of ash, at least one-half of which was sand, and the remainder sulphate of lime, (gypsum.) In other samples 20, 30, 50 and even 60 _per cent._ remained after burning off the organic matter. In these cases the ash is chiefly sand. The amount of ash found in those peats which were most free from sand, ranges from five to nine _per cent._ Probably the average proportion of true ash, viz.: that derived from the organic matters themselves, not including sand and accidental ingredients, is not far from five _per cent._ In twenty-two specimens of European peat, examined by Websky, Jæckel, Walz, Wiegmann, Einhof and Berthier, eleven contained from 0.6 to 3.5 _per cent._ of ash. The other eleven yielded from 5.3 to 22 _per cent._ The average of the former was 2.4, that of the latter 12.7 _per cent._ Most of these contained a considerable proportion of sand or soil. Variation in the composition as well as in the quantity of ash is very great. Three analyses of peat-ashes have been executed at the author's instance with the subjoined results: ANALYSES OF PEAT-ASHES. ---------------------------+-----------+-----------+---------- | A. | B. | C. Potash. | 0.69 | 0.80 | 3.46 Soda. | 0.58 | | trace. Lime. | 40.52 | 35.59 | 6.60 Magnesia. | 6.06 | 4.92 | 1.05 Oxide of iron and alumina. | 5.17 | 9.08 | 15.59 Phosphoric acid. | 0.50 | 0.77 | 1.55 Sulphuric acid. | 5.52 | 10.41 | 4.04 Chlorine. | 0.15 | 0.43 | 0.70 Soluble silica. | 8.23 | 1.40 } | Carbonic acid. | 19.60 | 22.28 } | 67.01 Sand. | 12.11 | 15.04 } | +-----------+-----------+---------- | 99.13 | 100.74 | 100.00 ---------------------------+-----------+-----------+---------- A was furnished by Mr. Daniel Buck, Jr., of Poquonock, Conn., and comes from a peat which he uses as fuel. B was sent by Mr. J. H. Stanwood, of Colebrook, Conn. C was sent from Guilford, Conn., by Mr. Andrew Foote.[5]