The descent of man, and selection in relation to sex. By Charles Darwin ...

2

The variation of animals and plants under domestication / By Charles Darwin.

2

The descent of man, and selection in relation to sex / by Charles Darwin.

1

The life and letters of Charles Darwin, including an autobiographical chapter. Edited by his son, Francis Darwin.

3

Text-book of paleontology / edited by Charles R. Eastman ... adapted from the German of Karl A. von Zittel...

v. 1

The descent of man, and selection in relation to sex. By Charles Darwin ...

1

A monograph on the sub-class Cirripedia, with figures of all the species. By Charles Darwin.

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A monograph on the sub-class Cirripedia, with figures of all the species. By Charles Darwin.

1

The descent of man, and selection in relation to sex. By Charles Darwin.

1

The descent of man, and selection in relation to sex / by Charles Darwin.

2

The life and letters of Charles Darwin, including an autobiographical chapter, ed. by his son Francis Darwin ...

1

Alterações morfológicas e citológicas do cafeeiro (Coffea arabica L, var. Bourbon (B. Rodr.) Choussy) cultivado em solução nutritiva decorrentes das deficiências e excessos dos macronutrientes

The present work was carried out in order to study: (1) the symptoms of deficiency and excess of macronutrients (N, P, K, Ca, S, Mg) in the coffee plant (Coffea arabica L. var. Mundo novo); (2) the modifications induced by those treatments in the hystological make up of the leaves; (3) the effects of deficiency and excess on the growth and in the chemical composition of the plants. Young coffee plants were grown in nutrient solution, three treatments being used, namely: complete solution (HOAGLAND & ARNON, 1950), deficient solution, in which a giVen element was omitted, and solution with 3 times the concentration of the element under study. The main conclusions can be summaryzed as follows. 1. SYMPTOMS. Clear cut symptoms of malnutrition were observed in the treatments: -N, -P, +P, -Ca, -Mg, -S and +S; the signals - and + stared respectively for deficient and excess level. 2. HISTOLOGICAL EFFECTS. The most definite alterations took place in the treatments +P, -Mg and +S. Usually the characteristics of the chloroplasts were affected: loss of the green color and coalescence into irregular bodies.