An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página v
... mass of evidence upon which the modern science of botany is founded , are , nevertheless , anxious to ac- quire a distinct idea of the nature of that evidence . Another and not less important purpose has been to demonstrate , by a ...
... mass of evidence upon which the modern science of botany is founded , are , nevertheless , anxious to ac- quire a distinct idea of the nature of that evidence . Another and not less important purpose has been to demonstrate , by a ...
Página 2
... mass of the albumen of Alstromeria salsilla , see fig . 2. c . where it is 300 of an inch in diameter . Valentin has measured the thick- ness of the intercellular organic mucus in several instances , and gives the following table of the ...
... mass of the albumen of Alstromeria salsilla , see fig . 2. c . where it is 300 of an inch in diameter . Valentin has measured the thick- ness of the intercellular organic mucus in several instances , and gives the following table of the ...
Página 8
... mass of tissue composed of bladders filled with little green balls . Of these some grew into long slender tubes , pointed at each end , and unquestionably adhering by one of their ends to the inside of the sac ; others from polygons ...
... mass of tissue composed of bladders filled with little green balls . Of these some grew into long slender tubes , pointed at each end , and unquestionably adhering by one of their ends to the inside of the sac ; others from polygons ...
Página 9
... masses . It is transparent , and in most cases colourless : when it appears otherwise , its colour is caused by matter contained within it . If a thin slice of the pith of elder , or of any other plant , be examined with a microscope ...
... masses . It is transparent , and in most cases colourless : when it appears otherwise , its colour is caused by matter contained within it . If a thin slice of the pith of elder , or of any other plant , be examined with a microscope ...
Página 14
... mass of spheroidal bladders is pressed together equally in all directions , rhomboidal dodecahedrons are pro- duced , which , if cut across , exhibit the appearance of hexa- gons . ( Plate I. fig . 12. ) This is the state in which the ...
... mass of spheroidal bladders is pressed together equally in all directions , rhomboidal dodecahedrons are pro- duced , which , if cut across , exhibit the appearance of hexa- gons . ( Plate I. fig . 12. ) This is the state in which the ...
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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.