Journal of the Royal Microscopical Society, Volume 1Royal Microscopical Society., 1878 |
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Halaman 4
... indices given a small quantity due to the effects of t t d - by the formula μ = spherical aberration which varies with the aperture and correction of the object - glass , and also with the value of the index in each particular case . In ...
... indices given a small quantity due to the effects of t t d - by the formula μ = spherical aberration which varies with the aperture and correction of the object - glass , and also with the value of the index in each particular case . In ...
Halaman 7
... indices , have no ordinary ray , and no perma- nently unifocal image , but two bifocal images polarized in opposite planes . We may thus have four different apparent indices . In the case of orpiment the image of a small circular hole ...
... indices , have no ordinary ray , and no perma- nently unifocal image , but two bifocal images polarized in opposite planes . We may thus have four different apparent indices . In the case of orpiment the image of a small circular hole ...
Halaman 8
... indices can be directly measured . When the section is parallel to two of the focal axes , the three true indices being μ , μ , " , the four observed indices are From lines perpendicular to the plane of polarization From lines parallel ...
... indices can be directly measured . When the section is parallel to two of the focal axes , the three true indices being μ , μ , " , the four observed indices are From lines perpendicular to the plane of polarization From lines parallel ...
Halaman 9
... indices . The natural planes of crystals belonging to all those systems in which the axes are rectangular , are , however , often in the proper direction ; and , unless their surfaces be very irregular , perfectly satisfactory results ...
... indices . The natural planes of crystals belonging to all those systems in which the axes are rectangular , are , however , often in the proper direction ; and , unless their surfaces be very irregular , perfectly satisfactory results ...
Halaman 10
... indices of the various minerals usually met with in rocks . In order to identify these with confi- dence , there ought to be no considerable error in the second place of decimals of their measured indices . I , however , now find that ...
... indices of the various minerals usually met with in rocks . In order to identify these with confi- dence , there ought to be no considerable error in the second place of decimals of their measured indices . I , however , now find that ...
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action Amphibia Amphiuma tridactylum angle angular aperture aniline animal aperture apparatus appear axis bacteria Bacterium balsam blood blood-corpuscle of Amphiuma body Canada balsam cells centre chromic acid coloured blood-corpuscles colourless contraction corpuscles covering glass crystals delicate described diameter diatoms disk distinct Ditto double contour edge examination eye-piece flagella flagellum fluid focal focus Foveaux Strait Frank Crisp Frog genus give granules hairs illumination inch indices insects Journal lens lenses light lines liquid matter measured membraneous layer method micro millimetre mineral minute nucleus object-glass oblique observed obtained optical ordinary organs paper picric acid plate present President prism produced Professor protoplasm Radiolaria rays reagent refraction represented rotifers ROYAL MICROSCOPICAL SOCIETY seen slide solution species specimens sponge staining striæ structure Stylaster substance surface termo thickness thin tint tion tissues tube woodcut
Bagian yang populer
Halaman 30 - President, in the chair. The minutes of the preceding meeting were read and confirmed, a list of donations was read, and the thanks of the meeting were voted to the donors.
Halaman 90 - LIGHT: a Series of Simple, entertaining, and Inexpensive Experiments in the Phenomena of Light, for the Use of. Students of every age.
Halaman 123 - ... unfetters the mind from prejudices of every kind, and leaves it open and free to every impression of a higher nature which it is susceptible of receiving, guarding only against enthusiasm and self-deception by a habit of strict investigation, but encouraging, rather than suppressing, everything that can offer a prospect or a hope beyond the present obscure and unsatisfactory state.
Halaman 155 - The following list of presents was read, and the thanks of the meeting were voted to the respective donors ; viz., FOR THE LIBRARY.
Halaman 55 - numerical aperture " is equal to the product of the refractive index of the medium in front of the objective, multiplied into the sine of the semi-angular aperture=n sin. w. This definition of "numerical aperture" offers at once a means by which all objectives, whether dry, water, or oil .immersion, can be directly compared. It is based on the theory whence Professors Abbe and Helmholtz deduced the limit of visibility. The...
Halaman 156 - The President proposed a vote of thanks to the author of the paper, and also to Mr.
Halaman 40 - On some remarkable forms of animal life from the great deeps off the Norwegian coast.
Halaman 121 - In mathematics, chemistry, and every branch of natural philosophy, how many are the inquiries necessary for their improvement and completion, which, taken separately, do not appear to lead to any specifically advantageous purpose ! Ho'w many useful inventions, and how much valuable and improving knowledge, would have been lost, if a rational curiosity, and a mere love of information, had not generally been allowed to be a sufficient motive for the search after truth !" — Malthus's Principles of...
Halaman 37 - Society should publish its own ' Transactions,' and the Council fully hoped that they might be able not only to do this, but also to give a good deal of other valuable matter relating to microscopical science. The President then delivered his Annual Address to the Society. Mr. Charles Brooke begged to propose a vote of thanks to the President for the very able Address which they had heard read. It was quite clear that in opening up an entirely new branch of microscopical research, it could only be...
Halaman 93 - President, in the Chair. The minutes of the preceding meeting were read and confirmed. The following gentlemen were duly elected Fellows of the.