An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página 7
... experiments of Schleiden . Of the organic mucus , membrane , and elementary fibre thus described , all the elementary organs of plants are con- structed . For the convenience of description , they may be considered as of five different ...
... experiments of Schleiden . Of the organic mucus , membrane , and elementary fibre thus described , all the elementary organs of plants are con- structed . For the convenience of description , they may be considered as of five different ...
Página 124
... experiments were instituted : Five bulbs were sown upon powdered sandstone , and it was found that the face which touched the sandstone produced roots , and the opposite face formed stomates . It was , how- ever , possible that the five ...
... experiments were instituted : Five bulbs were sown upon powdered sandstone , and it was found that the face which touched the sandstone produced roots , and the opposite face formed stomates . It was , how- ever , possible that the five ...
Página 265
... experiments of Savi of Pisa . This observer introduced into different vessels , 1. the granules ; 2. the grains ; and , 3. , the two intermixed . In the first two nothing germinated ; in the third the grains floated to the surface and ...
... experiments of Savi of Pisa . This observer introduced into different vessels , 1. the granules ; 2. the grains ; and , 3. , the two intermixed . In the first two nothing germinated ; in the third the grains floated to the surface and ...
Página 289
... experiments , made independently of each other , and in entirely different ways , both lead to the conclu- sion that the original tissue of plants is in all cases of the same chemical constitution , or nearly so , but that the sedi ...
... experiments , made independently of each other , and in entirely different ways , both lead to the conclu- sion that the original tissue of plants is in all cases of the same chemical constitution , or nearly so , but that the sedi ...
Página 291
... experiment I instituted was on the leaves of Pleurothallis ruscifolia . The greater part of the cells of this plant contain beautiful spiral fibres , which appear to grow firmly against the walls of the cells . These fibres are all very ...
... experiment I instituted was on the leaves of Pleurothallis ruscifolia . The greater part of the cells of this plant contain beautiful spiral fibres , which appear to grow firmly against the walls of the cells . These fibres are all very ...
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Palavras e frases frequentes
Adolphe Brongniart albumen anther apex appears axis bark base become body botanists Botany bracts branches buds bundles called calyx Cand Candolle carbonic acid carpels cause cavity cells cellular tissue centre chalaza character colour common considered consists containing corolla cotyledons cyclosis developement dicotyledons direction disk distinct Dutrochet elongated embryo epidermis exist external extremity fibres filament fleshy flowers fluid foramen fruit glands grains green growing hairs hilum inches integument kind latex layers leaf leaflets leaves light Linnæus lobes margin matter medullary rays membrane Mirbel monocotyledons nature nitrogen nucleus observed organs ovarium ovary ovule oxygen parenchyma pericarp petals petiole pistil pith placenta plants Plate plumula pollen pollen tube produced quantity radicle Raphides remarked roots round seeds separate side sometimes species specimens spiral vessels stamens stem stigma stomates structure substance surface term terminating tion tree tubes vascular vegetable veins wood woody tissue yellow
Passagens conhecidas
Página 593 - Dr. Ure's Dictionary of Arts, Manufactures, and Mines : Containing a clear Exposition of their Principles and Practice.