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Louis Agassiz: His Life and Correspondence

Creator: Agassiz, Elizabeth Cabot Cary, 1822-1907, Agassiz, Louis, 1807-1873
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part of the most elementary instruction in botany.* (* Botany owes to Alexander Braun and Karl Schimper the discovery of this law, by which leaves, however crowded, are so arranged around the stem as to divide the space with mathematical precision, thus giving to each leaf its fair share of room for growth.) "1. Where is the first diverging point of the stems and roots in plants, that is to say, the first geniculum? "2. How do you explain the origin of those leaves on the stem which, not arising from distinct geniculi, are placed spirally or scattered around the stem? "3. Why do some plants, especially trees (contrary to the ordinary course of development in plants), blossom before they have put forth leaves? (Elm-trees, willow-trees, and fruit-trees.) "4. In what succession does the development of the organs of the flower take place?--and their formation in the bud? (Compare Campanula, Papaver.) "5. What are the leaves of the Spergula? "6. What are the tufted leaves of various pine-trees? (Pinus sylvestris, Strobus, Larix, etc.). . .
Literary Taste: How to Form It

LITERARY TASTE: HOW TO FORM IT With Detailed Instructions for Collecting a Complete Library of English Literature by ARNOLD BENNETT 1913 CONTENTS
"8. What is individuality in plants?" The next letter contains Agassiz's answer to Dr. Leuckart's questions concerning the eggs he had sent him, and some farther account of his own observations upon them. AGASSIZ TO BRAUN. NEUCHATEL, June 20, 1827. . . .Now you shall hear what I know of the "Hebammen Krote." How the fecundation takes place I know not, but it must needs be the same as in other kinds of the related Bombinator; igneus throws out almost as many eggs hanging together in clusters as obstetricans; fuscus throws them out from itself in strings (see Roseld's illustration). . .I have now carefully examined the egg clusters of obstetricans; all the eggs are in one string and hang together. This string is a bag, in which the eggs lie inclosed at different distances, though they seem in the empty space to be fallen, thread-like, together. But if you stretch the thread and press the eggs, they change their places, and you can distinctly see that they lie free in the bag, having their own membranous envelopes corresponding to those of other batrachian eggs. Surely this species seeks the water at the time of fecundation, for so do all batrachians, the water being indeed a more fitting medium for