An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página v
... supposed to be proved , or the reasoning upon which they are based in cases where direct proof is unattainable ; to show the causes of errors now exploded , the insufficiency of the arguments by which doubtful theories are still ...
... supposed to be proved , or the reasoning upon which they are based in cases where direct proof is unattainable ; to show the causes of errors now exploded , the insufficiency of the arguments by which doubtful theories are still ...
Página 3
... supposed to be owing to the incorporation or incrustation of secreted matter . This was first observed by Mohl in Palm - trees , where he found a successive addition of strata to the lining of the cavities of the cells ; and is appa ...
... supposed to be owing to the incorporation or incrustation of secreted matter . This was first observed by Mohl in Palm - trees , where he found a successive addition of strata to the lining of the cavities of the cells ; and is appa ...
Página 5
... supposed pores . Dutrochet asserted them to be grains of semi - trans- parent matter sticking to the membrane : he found that boiling them in hot nitric acid rendered them opaque , and that treating them with a solution of caustic ...
... supposed pores . Dutrochet asserted them to be grains of semi - trans- parent matter sticking to the membrane : he found that boiling them in hot nitric acid rendered them opaque , and that treating them with a solution of caustic ...
Página 6
... supposed that they are passages to allow of permeation from one cell to another ; but this arrangement is by no means uniform ( see same fig . b ) . * Elementary Fibre may be compared to hair of inconceiv- able fineness , but it is ...
... supposed that they are passages to allow of permeation from one cell to another ; but this arrangement is by no means uniform ( see same fig . b ) . * Elementary Fibre may be compared to hair of inconceiv- able fineness , but it is ...
Página 9
... from each other without boiling . It was formerly thought that cellular tissue might be compared to the air bubbles in a lather of soap and water ; while by some it has been supposed to be formed. CHAP . I. 9 CELLULAR TISSUE .
... from each other without boiling . It was formerly thought that cellular tissue might be compared to the air bubbles in a lather of soap and water ; while by some it has been supposed to be formed. CHAP . I. 9 CELLULAR TISSUE .
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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.