The Monthly Microscopical Journal: Transactions of the Royal Microscopical Society, and Record of Histological Research at Home and Abroad, Volumen6Robert Hardwicke, 1871 |
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... STRUCTURE OF PODURA SCALES . By F. H. Wenham , Vice - President R.M.S. .. .. III . ON SOME NEW PARASITES . By T. Graham Fonton , F.Z.S. , Honorary Secretary Bristol Microscopical Society .. .. 8 IV . ON SOME IMPROVEMENTS IN THE SPECTRUM ...
... STRUCTURE OF PODURA SCALES . By F. H. Wenham , Vice - President R.M.S. .. .. III . ON SOME NEW PARASITES . By T. Graham Fonton , F.Z.S. , Honorary Secretary Bristol Microscopical Society .. .. 8 IV . ON SOME IMPROVEMENTS IN THE SPECTRUM ...
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... structure , and the difficulty of finding characters by which to establish the species , for the varieties are endless , and such a common facies is impressed on the whole group that Linnæus regarded them all as one species , which he ...
... structure , and the difficulty of finding characters by which to establish the species , for the varieties are endless , and such a common facies is impressed on the whole group that Linnæus regarded them all as one species , which he ...
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... structure . Commencing with the spore , we find that on germination it does not produce the much - branched confervoid prothallium of mosses , but if growing on the wet peat , a lobed foliaceous production results , exactly like one of ...
... structure . Commencing with the spore , we find that on germination it does not produce the much - branched confervoid prothallium of mosses , but if growing on the wet peat , a lobed foliaceous production results , exactly like one of ...
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... structure that I bring forward these remarks . Some seventeen British species are known , all of which I hope to illustrate ; and in carrying out this object , I shall feel thankful for good specimens of any of our species , but ...
... structure that I bring forward these remarks . Some seventeen British species are known , all of which I hope to illustrate ; and in carrying out this object , I shall feel thankful for good specimens of any of our species , but ...
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... Structure of Podura Scales . By F. H. WENHAM , Vice - President R.M.S. MR . MOINTIRE has kindly presented me with a number of slides ; two of them are superb specimens of the test Podura , L. curvicollis , with markings remarkably dark ...
... Structure of Podura Scales . By F. H. WENHAM , Vice - President R.M.S. MR . MOINTIRE has kindly presented me with a number of slides ; two of them are superb specimens of the test Podura , L. curvicollis , with markings remarkably dark ...
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Página 97 - On the whole, then, while giving due credit to Prof. Huxley and those who have preceded him in this matter, for directing attention to this curious and no doubt important constituent of mineral fuel, and admitting that I may possibly have given too little attention to it, I must maintain that Sporangite beds are exceptional among coals, and that cortical and woody matters are the most abundant ingredients in all the ordinary kinds; and to this I cannot think that the coals of England constitute an...
Página 99 - A single trunk of sigillaria in an erect forest presents an epitome of a coal-seam. Its roots represent the stigmaria underclay; its bark the compact coal; its woody axis the mineral charcoal ; its fallen leaves and fruits, with remains of herbaceous plants growing in its shade, mixed with a little earthy matter, the layers of coarse coal. The condition of the durable outer bark of erect trees, concurs with the chemical theory of coal, in showing the especial suitableness of this kind of tissue for...
Página 99 - Stigmaria underclay; its bark the compact coal; its woody axis, the mineral charcoal; its fallen leaves (and fruits), with remains of herbaceous plants growing in its shade, mixed with a little earthy matter, the layers of coarse coal. The condition of the durable outer bark of erect trees concurs with the chemical theory of coal, in showing the especial suitableness of this kind of tissue for the production of the purer compact coals. It is also probable that the comparative impermeability of the...
Página 241 - These laminee are separated by short vertical piles of cells, believed to be medullary rays. In the transverse section the intersected mouths of the vessels form radiating lines ; and the whole structure is regarded as an early type of an exogenous cylinder; it is from this cylinder alone that the vascular bundles going to the leaves are given off. This woody zone is surrounded by a very thick cortical layer, which is parenchymatous...