...be untenable ; and it becomes evident, from most conclusive proofs, that humus, in the form in'which it exists in the soil, does not yield the smallest nourishment to plants/' Dr. Liebig enters into a lengthened argument in corroboration of this point, in which he shows that...

...quantities to furnish them with the carbon they require during their growth. Hence he deduces that "humus in the form in which it exists in the soil does not yield the smallest nourishment to plants; the carbon must therefore be drawn from some other source ;" and since animal and vegetable matter...

...soils. It appears, however, from the masterly researches of Liebig and others, that the so-called humus, in the form in which it exists in the soil, does not yield the smallest nourishment to plants; that it only accelerates their growth, in so far as it serves as a medium of fixing the inorganic elements...

...where its carbon is abstracted. Yet Liebig adduces the following most conclusive proofs that humus, in the form in which it exists in the soil, does not yield the smallest nourishment to plants. J . The humus or humic acid of chemists, although soluble when newly precipitated, becomes completely...

...humus. Liebig thinks it " untenable ; and it becomes evident, from most conclusive proofs, that humus in the form in which it exists in the soil, does not...air. During the decay of vegetable matter, carbonic acid and ammonia are evolved, and upon the completion of the process, and the entire dissolution and...

...examination, is found to be untenable, and it becomes evident from most conclusive proofs that kutmis in the form in which it exists in the soil, does not yield the smallest nourishment to plants. The adherence to the above incorrect opinion has hitherto rendered it impossible for the true theory...

...page, the following sentence: — " It becomes evident, from the most conclusive proofs, that humus, in the form in which it exists in the soil, does not yield the smallest nourishment to plants." Let us, therefore, examine these " most conclusive proofs." They may be briefly stated under the following...

...examination, is found to be untenable, and it becomes evident, from most conclusive proofs, that humus, in the form in which it exists in the soil, does not yield the smallest nourishment to plants." This view he substantiates by a reference to the facts, that the hutn ic add of chemi sts, the humus...

...examination, is found to be untenable, and it becomes evident, from the most conclusive proofs, that humus, in the form in which it exists in the soil, does not yield the smallest nourishment to plants." "The names given to these substances might lead to the supposition that their composition is identical....

...when admitted to a strict examination, is found to be untenable ; and it becomes evident that humus in the form in which it exists in the soil does not yield the smallest nourishrpept to plants." — p. 61. VOL. LIII. — NO. 112. 20 He attempts to prove his position, that...