[132] "The large amount of potash in unwashed wool is very remarkable: a fleece must sometimes contain more potash than the whole body of the shorn sheep."—Warington's 'Chemistry of the Farm,' p. 78.
[133] See Appendix, Note II., p. 279.
[134] The urine of the pig, from the nature of its food, is, as a general rule, a very poor nitrogenous manure.
[135] See Appendix, Note XV., p. 290.
[136] See Appendix, Note III., p. 280.
[137] See Appendix, Note XVIII., p. 291.
[138] The nitrogen present in the urine, it may be well to point out, is derived from the waste of nitrogenous tissue as well as from nitrogenous matter of the food digested.
[139] Note IV., p. 281.
[140] Warington puts this matter admirably in the following words: "If the food is nitrogenous and easily digested, the nitrogen in the urine will greatly preponderate. If, on the other hand, the food is one imperfectly digested, the nitrogen in the solid excrement may form the larger quantity. When poor hay is given to horses, the nitrogen in the solid excrement will exceed that contained in the urine. On the other hand, corn, cake, and roots yield a large excess of nitrogen in the urine." ('Chemistry of the Farm,' p. 137).
[141] See p. 281.