The New Encyclopaedia Britannica, Volume 10Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 18
... plant from which the leaves are taken - lower leaves usually have less nicotine . There is con- siderable variation in commercial tobacco , but on average the dark , air - cured and fire- cured types contain 4 % to 42 % nicotine ; ci ...
... plant from which the leaves are taken - lower leaves usually have less nicotine . There is con- siderable variation in commercial tobacco , but on average the dark , air - cured and fire- cured types contain 4 % to 42 % nicotine ; ci ...
Page 305
... plants that includes the artillery plant ( P. mi- crophylla ) , and pellitory ( Parietaria ) , a genus of wall plants , are grown as ornamentals . Baby tears ( Helxine soleiroli ) , a mosslike creeping plant with round leaves , often is ...
... plants that includes the artillery plant ( P. mi- crophylla ) , and pellitory ( Parietaria ) , a genus of wall plants , are grown as ornamentals . Baby tears ( Helxine soleiroli ) , a mosslike creeping plant with round leaves , often is ...
Page 364
... plant internal transport system 14 : 501h ' stem tissue organization 13 : 727e vascular ray , in plants , a vertical layer of parenchyma ( q.v .; ground tissue ) , one to a few cells thick , produced by the cambium , a layer of cell ...
... plant internal transport system 14 : 501h ' stem tissue organization 13 : 727e vascular ray , in plants , a vertical layer of parenchyma ( q.v .; ground tissue ) , one to a few cells thick , produced by the cambium , a layer of cell ...
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