Journal of the Royal Microscopical Society, Volume 2Royal Microscopical Society, 1879 ... containing its transactions and proceedings and a summary of current researches relating to zoology and botany (principally Invertebrata and Cryptogamia), microscopy, &c. |
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Halaman 16
... tion is only the eight millionths of an inch , the lines themselves being the 8000th and the 7000th of an inch respectively , and reduced in the miniature thirty - eight times ? Reducing the numbers to decimals , if S be the space ...
... tion is only the eight millionths of an inch , the lines themselves being the 8000th and the 7000th of an inch respectively , and reduced in the miniature thirty - eight times ? Reducing the numbers to decimals , if S be the space ...
Halaman 20
... tion in embracing the truths conveyed in the exquisite formula presented to the microscopical world by , I believe , independently , Professors Helmholtz and Abbe . It is almost needless to remark that very firm supports and delicacy of ...
... tion in embracing the truths conveyed in the exquisite formula presented to the microscopical world by , I believe , independently , Professors Helmholtz and Abbe . It is almost needless to remark that very firm supports and delicacy of ...
Halaman 24
... tion of a method of drawing objects under the Microscope originally described in ' Hardwicke's Science - Gossip ' for 1867 ( p . 236. ) The method there suggested was to throw the image formed by the object - glass on to a sheet of ...
... tion of a method of drawing objects under the Microscope originally described in ' Hardwicke's Science - Gossip ' for 1867 ( p . 236. ) The method there suggested was to throw the image formed by the object - glass on to a sheet of ...
Halaman 28
... tion ' . . . . but the markings have again become indistinct or disappear altogether , showing that it is needful to allow a small portion of the light from the source of illumination to pass into the object - glass , and through the ...
... tion ' . . . . but the markings have again become indistinct or disappear altogether , showing that it is needful to allow a small portion of the light from the source of illumination to pass into the object - glass , and through the ...
Halaman 33
... tion image at its best point . With light at 60 ° from the optic axis the diffraction image is so far isolated that Amphipleura pellucida in balsam may be seen upon a dark background with the new oil lens . With light at 49 ° or 41 ...
... tion image at its best point . With light at 60 ° from the optic axis the diffraction image is so far isolated that Amphipleura pellucida in balsam may be seen upon a dark background with the new oil lens . With light at 49 ° or 41 ...
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alcohol Algæ angle angular aperture animal Annelides Anzeiger aperture apparatus appear axis balsam become body canal cavity cells central centre character chitinous cilia colour Comptes Rendus Crustacea described diameter diatoms dorsal ectoderm eggs embryo endoderm examined fat-cells fibres filaments fluid Fungi ganglion genera genus glands glass glycerine gonidia granular granules hairs Histology illumination immersion inch Infusoria Journ Journal larva larvæ latter layer lens lenses light lines LXXXVIII margin membrane mesoderm Micr Microscope muscular nerves nucleus object oblique observed obtained optical organs osmic acid ovary ovum pair paper parasitic placed plate portion present Proc Prof Professor protoplasm rays refractive rotifer seen segment side slide Society species specimens spherical spherical aberration spicules sponge spores stage striæ structure surface terminal tion tissue tube Vertebrata vesicle vessels Vorticella wandering cells wiss Zeitschr Zool zoospores
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Halaman 490 - INDEX MEDICUS.— A Monthly Classified Record of the Current Medical Literature of the World.
Halaman 508 - ... be in the axis of the microscope. For obscure objects, seen by transmitted light, and for outline, a full central illumination is commonly best ; but for seeing delicate lines, like those on the scales of insects, it should be made to fall obliquely, and in a direction at right angles to the lines to be viewed. " The diaphragm is often of great use in modifying the light, and stopping such rays as would confuse the image (especially with low or moderate powers), but many cases occur when the...
Halaman 798 - ON THE POPULAR NAMES OF BRITISH PLANTS. Being an Explanation of the Origin and Meaning of the names of our indigenous and most commonly cultivated species.
Halaman 54 - ... microscopestands are placed is supported upon brick piers and arches independent of the main brick walls of the building, which form at the same time the basement of the building. The rest of the floor is supported entirely upon the outside walls and upon columns with stretchers extending under the crown of the arches reaching to the northern wall. This gives to the microscopic work the great advantage of complete isolation from all disturbance caused by walking over the floor. This will be duly...
Halaman 396 - It will be seen from the position of the object, that each ray of light passing from that point through the surface of the hemisphere, will be transmitted in straight lines, in a radial direction, without undergoing any refraction ;. the consequence of which is, that the full and undiminished aperture of the object.glass is made to bear upon the object.
Halaman 848 - ... but have no importance whatever as tubular structures. In the human child's ovary, numerous furrows or clefts between irregularities of the general surface are met with. Sections through these furrows and clefts produce the appearance as if the germ epithelium (pseudo-epithelium, Balfour) passed downwards into the ovary in the form of tubular open pits, as was described by Waldeyer and his predecessors. No real tubular structures from which Graafian follicles are formed exist in the mammalian...
Halaman 508 - ... diaphragm is often of great use in modifying the light, and stopping such rays as would confuse the image (especially with low or moderate powers); but many cases occur when the effects desired are best produced by admitting the whole from the mirror. If an achromatic condenser is employed instead of the diaphragm, its axis should correspond with that of the body; and its glasses, when adjusted to their right place, should show the image of the source of artificial light; or by day, that of a...
Halaman 213 - That the thanks of the meeting be given to the President for his Address, and that it be printed in the Journal of the Institute.
Halaman 507 - Much of the beauty of the objects seen depends upon the management of the light that is thrown upon or behind them; which can only be fully mastered by practice. It may be remarked, however, as a general rule, that in viewing those which are transparent, the plane mirror is most suitable for bright daylight; the concave for a lamp or candle, which should have the bull's-eye lens, when that is used, so close to it that the rays may fall nearly parallel on the mirror. If the bull's-eye lens is not...
Halaman 323 - Seal, hereunto annexed, particularly describes and ascertains the Nature of the said Invention and the Manner in which the same is to be performed...