International Journal of Microscopy & Natural Science, Volume 13Bailliere, Tindall & Cox., 1894 |
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Page 7
... length and Q the dis- tance of vision , M , , and F having the same significance as before , then M = 0 Q Φ F The difficulty in this case is the determination of the quantity O. If " Heliostat " will refer to the last number of the ...
... length and Q the dis- tance of vision , M , , and F having the same significance as before , then M = 0 Q Φ F The difficulty in this case is the determination of the quantity O. If " Heliostat " will refer to the last number of the ...
Page 9
... length remained the same , the optical tube - length had undergone some alteration by the removal of the field - lens . Investigation , how- ever , shows that when d , the distance between the lenses , is equal to f , the focus of the ...
... length remained the same , the optical tube - length had undergone some alteration by the removal of the field - lens . Investigation , how- ever , shows that when d , the distance between the lenses , is equal to f , the focus of the ...
Page 10
... length remains constant . If , however , the distance d is incorrectly measured , owing to the fact that the optical distance between the lenses is not the actual distance between them , but is the distance between the posterior ...
... length remains constant . If , however , the distance d is incorrectly measured , owing to the fact that the optical distance between the lenses is not the actual distance between them , but is the distance between the posterior ...
Page 12
... length of microscope . It will be seen that the foci lie inside the principal points . BA is the optical tube - length . " THE Rotifers and where to find them . BY JOHN HOOD , F.R.M.S. HE study of Natural History is doubtless destined ...
... length of microscope . It will be seen that the foci lie inside the principal points . BA is the optical tube - length . " THE Rotifers and where to find them . BY JOHN HOOD , F.R.M.S. HE study of Natural History is doubtless destined ...
Page 13
1 / 500th of an inch in length . They derive their name from the wheel - like appearance produced by the motion of the fine circlets . of cilia which arise on the front of their heads , it being by the vibratile action of these cilia ...
1 / 500th of an inch in length . They derive their name from the wheel - like appearance produced by the motion of the fine circlets . of cilia which arise on the front of their heads , it being by the vibratile action of these cilia ...
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Common terms and phrases
alcohol Algæ aniline animals Aphides Aphis appearance bacilli bacteria balsam beaded forms body capsule cent colour contains corpuscles cover-glass covered Crown 8vo decolourised dentine desmids diameters Diatoms diplococci distilled water dust eggs elytra epithelium epithelium cells examined extremity fibres filaments filter flagella fungi fungus ganglion gentian violet give glands glass glycerine granules of myelin illustrations inch insects JOURNAL OF MICROSCOPY larva larvæ London magnified mass matter membrane method methyl violet microscope MICROSCOPY AND NATURAL minute mounted mucus myelin nerve nerve-fibres nitric acid nucleus object observed odontoblasts ordinary organs ovum paper paraffin parasites particles plant plasomen plates portion preparation Price protoplasm pulp cavity quantity Rotifers sections seen segments sheath showing shown slide solution species specimens sporangium spores sputa sputum stained with gentian structure substance surface tibiæ tion tissue tooth trachea tube vegetable washed Whooping-cough
Popular passages
Page 280 - that the actual seat of whooping cough is in the head, and that the affection of the respiratory organs is only to be considered as the secondary effect, or as an effort of nature to relieve herself by expanding the lungs to an unusual degree, and thereby allowing a greater quantity of blood to flow into them, which may in some degree diminish the fullness and congestion in the head.
Page 122 - It is, I think, generally assumed, not only that the world really exists as we see it, but that it appears to other animals pretty much as it does to us. A little consideration, however, is sufficient to show that this is very far from being certain, or even probable.
Page 20 - ... receptacle furnished with a filter in the lower end, An air-pump supplies air to the receptacle, and by its pressure forces the collodion through the filter, removing all impurities. The collodion flows into a horizontal tube armed with three hundred cocks having glass spouts pierced by a small hole of the diameter of the thread of a cocoon as it is spun by the silkworm. The spinner opens the cock and the collodion issues in a thread of extreme delicacy. This thread, however, is not yet fit to...
Page 94 - ... feet in height, roofed with, orchid-stems that slope to the ground, regularly radiating from the central support, which is covered with a conical mass of moss, and sheltering a gallery round it One side of this hut is left open, and in front of it is arranged a bed of verdant moss, bedecked with blossoms and berries of the brightest colours. As these ornaments wither they are removed to a heap behind the hut, and replaced by others that are fresh. The hut is circular and some 3 feet in diameter,...
Page 366 - ... the blood and other fluids found in the animal tissues. He describes a method by which media can be prepared directly from these fluids by a process which reduces the difficulties of manipulation to a minimum. Break up the white of a hen's egg with an egg-beater till it loses its consistency ; add 40 per cent, of water and mix well ; pass the mixture through muslin to remove any shreds of insoluble material; add oi per cent, of caustic soda, and solidify in the autoclave.
Page 110 - THE BRITISH REPTILES: A Plain and Easy Account of the Lizards, Snakes, Newts, Toads, Frogs, and Tortoises indigenous to Great Britain.
Page 215 - ... drawings like those which have been found in caves in France and in the cave at Thayngen. It was found in the lowest part of the yellow " Kulturschicht " among bones and teeth of reindeer, horses, and other animals. On one side are a horse, a foal, and a reindeer, while several horses appear on the other. The style is not so fine as that of the Thayngen drawings, but, according to Herr...
Page 129 - At the place where the upper tracheal sac contracts there is, moreover, a conical striated organ, which is situated at the back of the leg, just at the apical end of the upper tracheal sac. The broad base lies against the external wall of the leg, and the fibres converge inwards. In some cases I thought I could perceive indications of bright rods, but I was never able to make them out very clearly.
Page 329 - THE STUDY OF THE BIOLOGY OF FERNS BY THE COLLODION METHOD. For Advanced and Collegiate Students.
Page 218 - ... or by experiment. Directions are given for the collection of specimens, for their preservation, and for preparing them for examination; also for performing simple physiological experiments.