The Northern Microscopist and Microscopical News, Том 21882 |
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Abbe acid Algæ amongst amplification angle angular aperture animal antennæ Antheridia aperture shutter apex appearance balsam beautiful calyptra Canada balsam capsule cells cernuous colour column common crystals Cypris Cysticercus depth diameters diatom dioicous disease distance Editor eggs exchange exhibited eyepiece fact Feather Moss filaments fluid Foraminifera fruit fungi fungus genus give glass Hypnum illumination illustrated immersion inch increase insects interesting Journal lamp larva larvæ leaves length lens lenses light Manchester Microscopical Society matter meeting Micros Millers Dale minute Monoicous mounted nerve NORTHERN MICROSCOPIST numerical aperture objective observation obtained optical ordinary organs paper penetration peristome plants plates pond portion present produced Prof protoplasm rays refractive refractive index result rocks rotifer Saprolegnia seen segments shewing slide solution species specimens spores stems structure subimago surface tion tube vegetable vision Volvox vorticella wide apertures
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Стр. 196 - Happy is the man that findeth wisdom, And the man that getteth understanding. For the merchandise of it is better than the merchandise of silver, And the gain thereof than fine gold. She is more precious than rubies: And none of the things thou canst desire are to be compared unto her. Length of days is in her right hand: In her left hand are riches and honor. Her ways are ways of pleasantness, And all her paths are peace. She is a tree of life to them that lay hold upon her: And happy is every one...
Стр. 127 - Hooker says that the universal presence of this invisible vegetation throughout the South Polar Ocean is a most important feature, since there is a marked deficiency in this region of higher forms of vegetation, and were it not for them there would neither be food for aquatic animals, nor could the ocean water be purified of the poisonous carbonic acid which animal respiration and decomposition are continually imparting to it.
Стр. 256 - ... of these microscopical plants, the vivifying power of the solar light, aided by some peculiar and as yet unknown property belonging to the natural whiteness of the snow itself, is highly influential in the production of the beautiful colour by which they are distinguished.
Стр. 172 - ... the protoplasm, when its life is gone. Professor Huxley writes concerning protoplasm thus : — " The properties of living matter distinguish it absolutely from all other kinds of things ; and," he continues, " the present state of our knowledge furnishes us with no link between the living and the not living.
Стр. 173 - ... was the capacity to multiply itself indefinitely, why do we need the constant change or transmutation of that which is dead into that which is living to-day. Says Huxley, " If all living beings have been evolved from pre-existing forms of life, it is enough that a single particle of protoplasm should once have appeared on the globe, as the result of no matter what agency ; in the eyes of a consistent evolutionist any further independent formation of protoplasm would be sheer waste.
Стр. 16 - I may not inappropriately conclude by quoting the well-known inscription on the tomb of Sir Christopher Wren, in St. Paul's Cathedral, London—"^/ monumentum requiris circumspice, for truly monuments of nature's handywork are all around him.
Стр. 345 - To illustrate this position a minute die may be imagined the ; 0 „'„ „ 0 inch broad. The highest angled objective really enables the observer to collect rays emanating from four sides and the top at the same instant. The human eye could at most view three sides at once. Doubtless the effect of this angular vision all round the corners, causes particles to look spherical, when sufficiently minute, even if cubical.
Стр. 213 - The greater part of all morphological work is of such a land, and in this line of observation therefore a proper economy of aperture is of equal importance with economy of power. Whenever the depth of the object under observation is not very restricted, and it is essential that the depth dimension shall be within the reach of direct observation, low and moderate powers cannot be overstepped, and no greater aperture should therefore be used than is required for the effectiveness of these powers —...
Стр. 342 - Refractive Indices. To utilize the full benefit of immersion objectives, it is of course essential that the object should be mounted in a medium, the refractive index of which is not less than that of the immersion fluid ; and down to a comparatively recent period Canada balsam was most commonly used for this purpose, particularly for diatoms. Mr. Stephenson, however, pointed out that although by the use of the balsam we have attained our object so far as the aperture is concerned, yet we have done...
Стр. 162 - That the penetration of the hyphro of the Saprolegnia into the derma renders it at least possible that the disease may break out in a fresh-run salmon without re-infection. 4. That the cause of the disease, the Saprolegnia, may flourish in any fresh water, in the absence of salmon, as a saprophyte upon dead insects and other animals. 5. That the chances of infection for a healthy fish entering a river, are prodigiously increased by the existence of diseased fish in that river, inasmuch as the bulk...