| good in compost. 23. " " | " No. 22 saturated with horse urine, | darker than No. 22. 24. " " | " No. 22 composted with white fish, | darker than No. 23; fish-bones evident. 25. A. M. Haling |moist, fresh dug. 26. " " |air-dry, No. 25 after two year's weathering. 27. " " |moist, fresh dug, good substitute for yard | manure as top-dressing on grass. 28. Albert Day | " coherent and hard; fresh dug, but from | surface where weathered; injurious to | crops; vitriol peat. (?) 29. C. Goodyear |air-dry, very hard tough cakes; when fresh dug, | "as good as cow dung." 30. Rev. Wm. Clift |moist, from an originally fresh water bog, | broken into 100 years ago by tide, now | salt marsh; good after weathering. 31. Henry Keeler |air-dry, leaf-muck, friable; when fresh, appears | equal to good yard manure. 32. John Adams |moist, overlies shell marl, fresh or weathered | does not compare with ordinary manure. 33. Rev. Wm. Clift |air-dry, from bottom of salt ditch, where tide | flows daily; contains sulphate of iron. FOOTNOTES: [2] The oxygen thus absorbed by water, serves for the respiration of fish and aquatic animals. [3] This sample contained also fish-bones, hence the larger content of nitrogen was not entirely due to absorbed ammonia. [4] Reichardt's analyses are probably inaccurate, and give too much ammonia and nitric acid. [5] These analyses were executed--A by Professor G. F. Barker; B by Mr. O. C. Sparrow; C by Mr. Peter Collier. [6] _Shell marl_, consisting of fragments and powder of fresh-water shells, is frequently met with, underlying peat beds. Such a deposit occurs on the farm of Mr. John Adams, in Salisbury, Conn. It is eight to ten feet thick. An air-dry sample, analyzed under the writer's direction, gave results as follows: "Water 30.62 {soluble in water 0.70} Organic matter { } 6.52 {insoluble in water 5.82} Carbonate of lime 57.09 Sand 1.86 Oxide of iron and alumina, with traces of potash, magnesia, sulphuric and phosphoric acid 3.91 ------- 100.00