FERTILIZERS, Commercial. COMMERCIAL FERTILIZERS--GYPSUM, chap. xvii, 102; Gypsum might be generally applied to cultivated land, with profit, 102; the case where it costs $10, or over, per ton, considered, 102; it should be used in all stables and yards, 102; on meadows and pastures, 102; _time_ and mode of application, 103; _how_ Gypsum impels and invigorates vegetable growth, referred to, 103; its value practically demonstrated in and around Paris, 303-4; the nature of Gypsum, 104; the chemists' theory of it, 104; its actual effect assumed as the basis of these remarks, 104; Gypsum ought to be extensively applied to pastures and slopes, 104-5; a farmer's observations on its effects, 105; it may be easily procured, 105; its trial requested, 105-6; soils can be improved by means of calcined clay, 105; a successful trial thereof, 106. ALKALIS ... SALT--ASHES--LIME, chap. xvii, 107; all our country's surface might be improved by the use of suitable fertilizers, 107; not many acres but might be made more fertile by their use, 107; comparative exhaustion of the soil soon renders them necessary, 107-8; the good farmer's inquiry on the subject, 108; the state of each soil respectively, the true guide in using fertilizers, 108; alkaline substances might be universally applied with profit, 108; the use of ashes considered, 108-9 Marls of New Jersey, 109; Salt, 109; Potash, 109; the author's trial of, 109-10; Lime as a fertilizer, 110; careful tests of the value of Alkalis suggested, 110-11. SOIL AND FERTILIZERS, chap. xix, 112; the farmer a manufacturer, 112; the opinion that some lands are naturally rich enough, 112; the great wheat product at the Salt Lake City Plain, 112; the author's experience regarding the imperfect manuring of land, 113; more manure and less seed should be applied by most farmers, 113; the richest soils deteriorate after successive crops, 114; Nature's law of inflexible exaction, 114; rich soil from the West exhibited at the N. Y. Farmers' Club, 114; chemical analysis made of same, 114; Professor Mapes' remark thereon, 114; the mistake of fertilizing poor lands only, 115; better to produce the same quantity of Corn from a small than a large area in certain cases, 115; barn-yard manure, and its use, 115-6; no farmer ever impoverished by making and using manure of his own manufacture, 117; Lime has been used without advantage, 111; reasons therefor, 111; adulteration of Lime, 111; farmers advised to be discriminating, 111; experiment recommended where there is doubt, 111; BONES--PHOSPHATES--GUANO, chap. xx, 118; wasteful outlay for fertilizers, 118;